Najnovšie - Ekonómia, manažment, marketing - Financie, finančný trh, investovanie strana 12 z 17

Blockchain is the ingeniously simple technology that powers Bitcoin. But it is much more than that, too. It is a public ledger to which everyone has access, but which no single person controls. It allows for companies and individuals to collaborate with an unprecedented degree of trust and transparency. It is cryptographically secure, but fundamentally open. And soon it will be everywhere. In Blockchain Revolution, Don and Alex Tapscott reveal: * how this game-changing technology will shape the future of the world economy * how it will improve everything from healthcare records to online voting, and from insurance claims to artist royalty payments Brilliantly researched and highly accessible, this is the essential text on the next major paradigm shift. Read it, or be left behind.

Ak si chceš prečítať len jednu knihu o tomto novom globálnom fenoméne, je to práve táto! Krytpomeny majú pred sebou veľmi perspektívnu budúcnosť a je dôležité vedieť o nich aspoň kľúčové informácie, ktoré dnes ,vo svete rýchleho technologického pokroku, patria k základnému vzdelaniu úspešných ľudí. Viac sa o nich dozviete v knihe, ktorú práve držíte v rukách. Krytpomena je digitálna forma peňazí, v podstate jednotky a nuly cirkulujúce na ineternete, elektróny prúdiace káblami alebo uväznené na pevných diskoch po celom svete. Obchod s krytpomenami napriek istému skepticizmu každý rok rastie. Neznalosť tejto problematiky je jednou z najväčších prekážok investovania na kapitálovom trhu. Zmenu, ktorú priniesli kryptomeny do sveta financií aj do bežného života, nemožno podceňovať. Všetkým ponúka príležitosť, aby realizovali svoje transakcie ihneď, bezpečne a priamo. Budete prekvapení, aký potenciál sa v kryptomene skrýva! Ľudia už od nepamäti snívali o lepšom svete. Známym príkladom je dielo Útopia Thomas Mora. Dnes, o 500 rokov neskôr, rôzni prognostici spochybňujú prevládajúce spoločenské modely na pozadí vysoko dynamického technologického vývoja a najmä ich vhodnosť pre budúcnosť. Individuálna sloboda verzus nátlak a kontrola zo strany štátu alebo viac osobného pohodlia a ľahší život za cenu straty súkromia? To všetko sú metafory pre základné otázky digitalizácie nášho sveta a spoločného vývoja človeka a stroja. Julian Hops nám vo svojej knihe pomáha nahliadnuť do týchto nových možností. Ponúka príležitosť pochopiť základné mechanizmy fungovania kryptoekonómie a rozoznať jej potenciály. Kniha predstavuje podsystém kryptomien a po prvý raz komplexne približuje celej verejnosti celý krytpoekonomický ekosystém. Doposiaľ však nikto neodpovedal na otázku, ako môže svet založený na blockchaine ekologicky udržateľne, respektíve na základe princípov trhového hospodárstva prispieť k rozvoju, ktorý podporuje blahobyt. Investovaním do kryptomien získalo za posledných desať rokov už mnoho ľudí viac než tisícpercentné výnosy. Táto kniha jednoducho a zrozumiteľne vysvetľuje, čo sú kryptomeny - ako si vybrať správne kryptomeny a ako do nich investovať. Získate informácie aj o prípadných rizikách a potenciálnom zisku. Či už sa chcete stať expertom na kryptomeny, alebo sa len dozvedieť niekoľko základných informácií - táto kniha je určená práve vám.

False economics. Threats, bribes, extortion. Debt, deception, coups, assassinations and unbridled military power. These are the tools used by the `corporatocracy' - a vast network of corporations, banks, colluding governments and rich and powerful individuals - to ensure that they retain and expand their wealth and influence, growing richer and richer as the poor become poorer. In his original, post 9/11 book, John Perkins revealed how he was recruited as an economic hit man in the 1970s, and exposed the corrupt methods American corporations use to spread their influence in the developing world, cheating countries out of trillions of dollars. In this new, extensively updated edition he lays bare the latest, terrifying evolution of the economic hit man, and how the system has become even more entrenched and powerful than ever before. In New Confessions of an Economic Hit Man, John Perkins provides fresh and chilling evidence of how the corporatocracy has grown its influence to every corner of the globe, making us all unwitting slaves to their regime. But he also provides advice on how we can end our unconscious support of the system and its self-serving, lethal economy.

Prioritním cílem finančních trhů je umožňovat zhodnocování finančních prostředků, které by mělo vést ke zvyšování reálného bohatství investorů. Jednou z možností jak tohoto cíle dosáhnout je investování za podpory psychologické analýzy. Obsah knihy je koncipován tak, aby čtenář v jednotlivých krocích za pomoci psychologické analýzy načerpal informace, které mu usnadní investování na finančních trzích. Před samotným vstupem na finanční trhy by si měl investor sestavit finančních plán podle předem vytyčených cílů zahrnující jeho ekonomické možnosti a vztah k riziku. V případě, že jednotlivec má volné peněžní prostředky, měl by se rozhodnout pro trh, kterému rozumí, protože tím snižuje riziko ztráty z volby investičních nástrojů v reálné nebo finanční podobě. Přehledně jsou popsány investiční příležitosti na finančních trzích s uvedením jejich specifičnosti. Vedle tradičních druhů investic jsou podrobněji charakterizovány trhy reálných, netradičních, trendových a moderních investic. Zařazena je i komparace jednotlivých trhů z hlediska finančních a reálných investic. Při sestavování finančního plánu, volby trhu a investičních instrumentů působí na investora řada psychologických faktorů jako je např. chamtivost a strach, které mají vliv na jeho dosažené výsledky při realizaci investičních záměrů. Východiskem pro pochopení těchto jevů jsou stručně charakterizovány psychologické jevy, pojmy, faktory a jejich vliv na investora. Na to navazuje výklad psychologie investování a obchodování, obsahující vnitřní a vnější chyby, kterých se investoři dopouštějí. Samostatná psychologická analýza vysvětluje podstatu této investiční analýzy včetně jejího vlivu na cenu instrumentů v porovnání s technickou a fundamentální analýzou. Na psychologickou analýzu navazují existující psychologické přístupy a metody, ale i nové navržené autorem knihy. Je zde uveden i provedený výzkum se zaměřením na spekulativní bubliny u společností působící v českém tržním prostředí. Na to navazuje komparace zkoumaných psychologických přístupů z několika zvolených hledisek. Vzhledem k tomu, že na finanční trhy působí sentiment investorů, který se projevuje v jejich náladách, zda investovat nebo ne, jsou zde uvedeny vybrané psychologické indikátory. Pro investory je velice podstatné a důležité vytváření portfolií investic vázaných na psychologickou analýzu, protože každý investor preferuje jinou dominantní oblast pro uskutečňování investičních záměrů ve vztahu k riziku. Investoři se rozhodují také podle dostupných investičních modelů, které usnadňují rozhodování o investičních záměrech. Proto je zde navržen nový model komodit, který indikuje investorům, kdy komoditu nakupovat a kdy prodávat, protože stanovit vnitřní hodnotu u komodit je velice obtížné. To má určitě pozitivní vliv na psychiku investorů, protože mají určitý nástroj, který může zpřesnit investiční rozhodování. V závěru je charakterizován psychologický analytik působící na finančních trzích. Vzhledem k jeho absenci u finančních společností, což potvrdil další provedený výzkum, byla vytvořena charakteristika jeho pracovní pozice, náplň a požadavky, které by měl splňovat. Kniha je určena jak profesionálním, ale i neprofesionálním a začínajícím investorům, kteří chtějí vstoupit do oblasti finančních trhů.

When a pseudonymous programmer introduced "a new electronic cash system that's fully peer-to-peer, with no trusted third party" to a small online mailing list in 2008, very few people paid attention. Ten years later, and against all odds, this upstart autonomous decentralized software offers an unstoppable and globally accessible hard money alternative to modern central banks. The Bitcoin Standard analyzes the historical context to the rise of Bitcoin, the economic properties that have allowed it to grow quickly, and its likely economic, political, and social implications. While Bitcoin is an invention of the digital age, the problem it purports to solve is as old as human society itself: transferring value across time and space. Author Saifedean Ammous takes the reader on an engaging journey through the history of technologies performing the functions of money, from primitive systems of trading limestones and seashells, to metals, coins, the gold standard, and modern government debt. Exploring what gave these technologies their monetary role, and how most lost it, provides the reader with a good idea of what makes for sound money, and sets the stage for an economic discussion of its consequences for individual and societal future-orientation, capital accumulation, trade, peace, culture, and art. Compellingly, Ammous shows that it is no coincidence that the loftiest achievements of humanity have come in societies enjoying the benefits of sound monetary regimes, nor is it coincidental that monetary collapse has usually accompanied civilizational collapse. With this background in place, the book moves on to explain the operation of Bitcoin in a functional and intuitive way. Bitcoin is a decentralized, distributed piece of software that converts electricity and processing power into indisputably accurate records, thus allowing its users to utilize the Internet to perform the traditional functions of money without having to rely on, or trust, any authorities or infrastructure in the physical world. Bitcoin is thus best understood as the first successfully implemented form of digital cash and digital hard money. With an automated and perfectly predictable monetary policy, and the ability to perform final settlement of large sums across the world in a matter of minutes, Bitcoin's real competitive edge might just be as a store of value and network for the final settlement of large payments a digital form of gold with a built-in settlement infrastructure. Ammous' firm grasp of the technological possibilities as well as the historical realities of monetary evolution provides for a fascinating exploration of the ramifications of voluntary free market money. As it challenges the most sacred of government monopolies, Bitcoin shifts the pendulum of sovereignty away from governments in favor of individuals, offering us the tantalizing possibility of a world where money is fully extricated from politics and unrestrained by borders. The final chapter of the book explores some of the most common questions surrounding Bitcoin: Is Bitcoin mining a waste of energy? Is Bitcoin for criminals? Who controls Bitcoin, and can they change it if they please? How can Bitcoin be killed? And what to make of all the thousands of Bitcoin knockoffs, and the many supposed applications of Bitcoin's 'block chain technology'? The Bitcoin Standard is the essential resource for a clear understanding of the rise of the Internet's decentralized, apolitical, free-market alternative to national central banks.

Proč máme tak nízkou mzdu? Proč nás banka trestá za to, že spoříme? Proč se všem státům neodpustí dluhy a nezačne se znovu od nuly? Proč dotace našemu hospodářství nepomáhají, nýbrž škodí? Ještě nikdy nebyl náš život tolik závislý na ekonomii. A ještě nikdy se neobjevovalo tolik falešných proroků jako dnes. Moderní ekonomická lákadla na nás útočí ze všech stran, vyznat se v nich je stále složitější. Skutečně se ale chceme zbavit hotovosti? A opravdu je pro nás výhodné platit eurem? Co se stane, když dáme všem lidem základní příjem? Kdo budou vítězové a kdo poražení nových ekonomických nápadů? Knížka přední české ekonomky mladé generace se nevyhýbá nepříjemným otázkám. Je určena pro každého, kdo chce slyšet jasné ekonomické odpovědi a kdo se nebojí používat zdravý rozum.

A National Besteller "Chilling...Reads like a West Coast version of All the President's Men." --The New York Times Book Review The full inside story of the breathtaking rise and shocking collapse of Theranos, the multibillion-dollar biotech startup, by the prize-winning journalist who first broke the story and pursued it to the end, despite pressure from its charismatic CEO and threats by her lawyers. In 2014, Theranos founder and CEO Elizabeth Holmes was widely seen as the female Steve Jobs: a brilliant Stanford dropout whose startup "unicorn" promised to revolutionize the medical industry with a machine that would make blood testing significantly faster and easier. Backed by investors such as Larry Ellison and Tim Draper, Theranos sold shares in a fundraising round that valued the company at more than $9 billion, putting Holmes's worth at an estimated $4.7 billion. There was just one problem: The technology didn't work. A riveting story of the biggest corporate fraud since Enron, a tale of ambition and hubris set amid the bold promises of Silicon Valley.

Who really creates wealth in our world? And how do we decide the value of what they do? At the heart of today's financial and economic crisis is a problem hiding in plain sight. In modern capitalism, value-extraction is rewarded more highly than value-creation: the productive process that drives a healthy economy and society. From companies driven solely to maximize shareholder value to astronomically high prices of medicines justified through big pharma's 'value pricing', we misidentify taking with making, and have lost sight of what value really means. Once a central plank of economic thought, this concept of value - what it is, why it matters to us - is simply no longer discussed. Yet, argues Mariana Mazzucato in this penetrating and passionate new book, if we are to reform capitalism - radically to transform an increasingly sick system rather than continue feeding it - we urgently need to rethink where wealth comes from. Which activities create it, which extract it, which destroy it? Answers to these questions are key if we want to replace the current parasitic system with a type of capitalism that is more sustainable, more symbiotic - that works for us all. The Value of Everything will reignite a long-needed debate about the kind of world we really want to live in.

How did money come to be invented? Why does it now have such significance in our lives? Does it make us happier or unhappier? And what does the future hold for it? With brilliant clarity and insight, Yuval Noah Harari takes the reader on a journey from the very first coins through to 21st century economics and shows us how we are all on the brink of a revolution, whether we like it or not. Selected from the books Sapiens and Homo Deus by Yuval Noah HarariVINTAGE MINIS: GREAT MINDS. BIG IDEAS. LITTLE BOOKS. A series of short books by the world's greatest writers on the experiences that make us human Also in the Vintage Minis series:Home by Salman RushdieBabies by Anne EnrightEating by Nigella LawsonDrinking by John Cheever

Unod már az olyan önfejlesztő könyveket, amelyek tele vannak érthetetlen szakkifejezésekkel, és a gyakorlatban tulajdonképpen használhatatlanok? A Scolar Kiadó új könyvsorozatának első kötetében csak egyetlen idegen szót kell megismerned: Asszertivitás. Ez az érdekeid érvényesítését jelenti oly módon, hogy mások igényeit is figyelembe veszed. A több évtizedes szakmai tapasztalatokkal rendelkező szerzőpáros nagy sikerű könyvében közérthetően fejti ki a témát, és konkrét élethelyzeteket mutat be, melyek segítségével Te is megtanulhatsz asszertív lenni önmagad, valamint családod, barátaid, szűkebb és tágabb környezeted érdekében.

Markets have long been acknowledged to be a superior mechanism for managing resources but until the advent of big data, they largely functioned better in theory than in practice. Now, as ideal markets are within reach because of vastly greater access to information, we are on the verge of a major disruption. As data becomes a more valuable asset than cash, the rules for surviving and thriving are changing. Reinventing Capitalism is a provocative look at how data is reinventing markets and, in so doing, is ushering in an era where the firm is no longer predominant. With richer and more comprehensive information about human wants and needs, an economy powered by data offers the possibility of increased abundance, equality, and resilience. The data-driven markets that will thrive in this environment are far better than firms at organizing human endeavors, meaning that finance driven capitalism is being displaced by its more efficient, more sustainable, and more democratic disruptor: data capitalism.

Have you ever wondered why we can afford to buy far more clothes than our grandparents ever could . . . but may be less likely to own a home in which to keep them all? Why your petrol bill can double in a matter of months, but it never falls as fast? Behind all of this lies economics. It’s not always easy to grasp the complex forces that are shaping our lives. But by following a dollar on its journey around the globe, we can start to piece it all together. The dollar is the lifeblood of globalisation. Greenbacks, singles, bucks or dead presidents: call them what you will, they are keeping the global economy going. Half of the notes in circulation are actually outside of the USA – and many of the world’s dollars are owned by China. But what is really happening as our cash moves around the world every day, and how does it affect our lives? By following $1 from a shopping trip in suburban Texas, via China’s central bank, Nigerian railroads, the oilfields of Iraq and beyond, The Almighty Dollar reveals the economic truths behind what we see on the news every day. Why is China the world’s biggest manufacturer – and the USA its biggest customer? Is free trade really a good thing? Why would a nation build a bridge on the other side of the planet? In this illuminating read, economist Dharshini David lays bare these complex relationships to get to the heart of how our new globalised world works, showing who really holds the power, and what that means for us all.

Nominated for the FT/McKinsey Business Book of the YearNominated for the Carnegie Medal for Excellence in NonfictionAmazon Top 5 Business Books of 2017'A prodigious feat of reporting' - Malcolm Gladwell`Black Edge has the grip of a thriller ... Everyone should read this book' - David Grann, New York Times bestselling author of THE LOST CITY OF Z How do super-rich bankers get away with it?There is a powerful new class of billionaire financiers in the world, who use their phenomenal wealth to write their own rules and laws. Chief among them is Steven Cohen, a Wall Street legend, and the basis for Damian Lewis's character in BILLIONS, who built his hedge fund into a $15 billion empire on the basis of wizard-like stock trading, and who flies to work by helicopter and owns one of the largest private art collections in the world. But his iconic status was shattered when his fund became the target of a sprawling FBI investigation into insider trading, charged with using illegal inside information - or `black edge' - to beat the market. His firm, SAC Capital, was ultimately indicted and pled guilty to charges of securities and wire fraud, and paid record criminal and civil fines of nearly $2 billion. But even as the company bearing his name pled guilty, Cohen himself was never charged, and is free to start trading publicly again from January 2018. Black Edge offers a revelatory look at the grey zone in which so much of Wall Street functions, and a window into the transformation of the worldwide economy. With meticulous reporting and powerful storytelling, this is a riveting, true-life legal thriller that takes readers inside the US government's pursuit of Cohen and his employees, and raises urgent questions about the power and wealth of those who sit at the pinnacle of the financial world.

Publikace se zabývá novými přístupy k hodnocení finanční výkonnosti podniků na globálním trhu, kterým zejména majitelé a manažeři malých a středních firem nepřipisují dostatečný význam. Jedná se o moderní finanční modely, které zohledňují ekonomický zisk, tržní hodnotu a tržní kritéria, na rozdíl od standardních finančních modelů, které jsou založené na bázi účetního zisku. Analytická část knihy je věnována empirické sektorové analýze a porovnání finanční výkonnosti vybraných odvětví potravinářského průmyslu v SR a ČR. Výsledkem jsou dva praktické lineární vícenásobné regresní modely finančního řízení pro malé a střední podniky, a to na bázi EAT jako standardního modelu řízení na bázi účetního zisku, a dále na bázi EVA, který reprezentuje moderní model řízení, který v sobě zahrnuje ukazatele s nejvýznamnějším vlivem na výkonnost MSP. Zkušené autorky řeší aktuální téma z reálné praxe, analyzují problematiku z pohledu moderního finančního manažera v malém a středním podniku a využívají teoretické poznatky finančního řízení s propojením na aplikaci v manažerské praxi, které uplatňují v praktických finančních modelech sloužících ke zvyšování finanční výkonnosti MSP na globálním trhu.

It's rare that a book appears with a fresh perspective on world affairs, but renowned economist Ha-Joon Chang has some startlingly original things to say about the future of globalization. In theory, he argues, the world's wealthiest countries and supra-national institutions like the IMF, World Bank and WTO want to see all nations developing into modern industrial societies. In practice, though, those at the top are 'kicking away the ladder' to wealth that they themselves climbed. Why? Self-interest certainly plays a part. But, more often, rich and powerful governments and institutions are actually being 'Bad Samaritans': their intentions are worthy but their simplistic free-market ideology and poor understanding of history leads them to inflict policy errors on others. Chang demonstrates this by contrasting the route to success of economically vibrant countries with the very different route now being dictated to the world's poorer nations. In the course of this, he shows just how muddled the thinking is in such key areas as trade and foreign investment. He shows that the case for privatisation and against state involvement is far from proven. And he explores the ways in which attitudes to national cultures and political ideologies are obscuring clear thinking and creating bad policy. Finally, he argues the case for new strategies for a more prosperous world that may appall the 'Bad Samaritans'.

Designed to bring Europe closer together, the euro has actually done the opposite: after nearly a decade without growth, unity has been replaced with dissent and enlargements with prospective exits. Joseph Stiglitz argues that Europe's stagnation and bleak outlook are a direct result of the fundamental flaws inherent in the euro project - economic integration outpacing political integration with a structure that actively promotes divergence rather than convergence. Money relentlessly leaves the weaker member states and goes to the strong, with debt accumulating in a few ill-favoured countries. The question now is: can the euro be saved? Laying bare the European Central Bank's misguided inflation-only mandate and explaining why austerity has condemned Europe to unending stagnation, Stiglitz outlines three possible ways forward: fundamental reforms in the structure of the Eurozone and the policies imposed on the member countries suffering the most; a well-managed end to the euro; or a bold, new system he dubs the 'flexible euro;. This important book, by one of the world's leading economists, addresses the euro-crisis on a bigger intellectual scale than any predecessor.

Ray Dalio, one of the world’s most successful investors and entrepreneurs, shares the unconventional principles that he’s developed, refined, and used over the past forty years to create unique results in both life and business—and which any person or organization can adopt to help achieve their goals. In 1975, Ray Dalio founded an investment firm, Bridgewater Associates, out of his two-bedroom apartment in New York City. Forty years later, Bridgewater has made more money for its clients than any other hedge fund in history and grown into the fifth most important private company in the United States, according to Fortune magazine. Dalio himself has been named to Time magazine’s list of the 100 most influential people in the world. Along the way, Dalio discovered a set of unique principles that have led to Bridgewater’s exceptionally effective culture, which he describes as “an idea meritocracy that strives to achieve meaningful work and meaningful relationships through radical transparency.” It is these principles, and not anything special about Dalio—who grew up an ordinary kid in a middle-class Long Island neighborhood—that he believes are the reason behind his success. In Principles, Dalio shares what he’s learned over the course of his remarkable career. He argues that life, management, economics, and investing can all be systemized into rules and understood like machines. The book’s hundreds of practical lessons, which are built around his cornerstones of “radical truth” and “radical transparency,” include Dalio laying out the most effective ways for individuals and organizations to make decisions, approach challenges, and build strong teams. He also describes the innovative tools the firm uses to bring an idea meritocracy to life, such as creating “baseball cards” for all employees that distill their strengths and weaknesses, and employing computerized decision-making systems to make believability-weighted decisions. While the book brims with novel ideas for organizations and institutions, Principles also offers a clear, straightforward approach to decision-making that Dalio believes anyone can apply, no matter what they’re seeking to achieve. Here, from a man who has been called both “the Steve Jobs of investing” and “the philosopher king of the financial universe” (CIO magazine), is a rare opportunity to gain proven advice unlike anything you’ll find in the conventional business press.

‘An indispensable guide.’ Reid Hoffman, co-founder of LinkedIn ‘Tech’s most valuable teacher.’ Forbes Silicon Valley’s leading intellectual and the founder of O’Reilly Media explores the upside and the potential downsides of our future – what he calls the ‘next economy’. Tim O’Reilly’s genius is to identify and explain emerging technologies with world shaking potential – the World Wide Web, Open Source Software, Web 2.0, Open Government data, the Maker Movement, Big Data. ‘The man who can really can make a whole industry happen,' according to Executive Chairman of Google Eric Schmidt, O’Reilly has most recently focused on the future of work – AI, algorithms, and new approaches to business organisation that will shape our lives. He has brought together an unlikely coalition of technologists, business leaders, labour advocates, and policy makers to wrestle with these issues. In WTF? he shares the evolution of his intellectual development, applying his approach to a number of challenging issues we will face as citizens, employees, business leaders, and a nation. What is the future when an increasing number of jobs can be performed by intelligent machines instead of people, or only done by people in partnership with those machines? What happens to our consumer based societies – to workers and to the companies that depend on their purchasing power? Is income inequality and unemployment an inevitable consequence of technological advancement, or are there paths to a better future? What will happen to business when technology-enabled networks and marketplaces are better at deploying talent than traditional companies? What’s the future of education when on-demand learning outperforms traditional institutions? Will the fundamental social safety nets of the developed world survive the transition, and if not, what will replace them? The digital revolution has transformed the world of media, upending centuries-old companies and business models. Now, it is restructuring every business, every job, and every sector of society. Yet the biggest changes are still ahead. To survive, every industry and organisation will have to transform itself in multiple ways. O’Reilly explores what the next economy will mean for the world and every aspect of our lives – and what we can do to shape it.

What if everything we thought we knew about history was wrong? From the global bestselling author of Empire, The Ascent of Money and Civilization, this is a whole new way of looking at the world. Most history is hierarchical: it's about popes, presidents, and prime ministers. But what if that's simply because they create the historical archives? What if we are missing equally powerful but less visible networks-leaving them to the conspiracy theorists, with their dreams of all-powerful Illuminati? The twenty-first century has been hailed as the Networked Age. But in The Square and the TowerNiall Ferguson argues that social networks are nothing new. From the printers and preachers who made the Reformation to the freemasons who led the American Revolution, it was the networkers who disrupted the old order of popes and kings. Far from being novel, our era is the Second Networked Age, with the computer in the role of the printing press. Those looking forward to a utopia of interconnected 'netizens' may therefore be disappointed. For networks are prone to clustering, contagions, and even outages. And the conflicts of the past already have unnerving parallels today, in the time of Facebook, Islamic State and Trumpworld.