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Connected: The Surprising Power of Our Social Networks and How They Shape Our Lives -- How Your Friends' Friends' Friends Affect Everything You Feel, Think, and Do Paperback – Illustrated, January 12, 2011
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Your colleague's husband's sister can make you fat, even if you don't know her. A happy neighbor has more impact on your happiness than a happy spouse. These startling revelations of how much we truly influence one another are revealed in the studies of Dr. Christakis and Fowler, which have repeatedly made front-page news nationwide.
In Connected, the authors explain why emotions are contagious, how health behaviors spread, why the rich get richer, even how we find and choose our partners. Intriguing and entertaining, Connected overturns the notion of the individual and provides a revolutionary paradigm-that social networks influence our ideas, emotions, health, relationships, behavior, politics, and much more. It will change the way we think about every aspect of our lives.
- Print length368 pages
- LanguageEnglish
- PublisherLittle, Brown Spark
- Publication dateJanuary 12, 2011
- Dimensions5.5 x 1 x 8.25 inches
- ISBN-100316036137
- ISBN-13978-0316036139
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Editorial Reviews
Review
"In a category of works of brilliant originality that can stimulate and enlighten and can sometimes even change the way we understand the world."―The New York Times
"Groundbreaking."―Kirkus
"An entertaining guide to the mechanics and importance of human networking."―Publishers Weekly
"Engaging and insightful...sure-to-be a blockbuster...Connected succeeds in connecting with its audience."―SeedMagazine.com
"Illuminating...The authors excel at drawing out the devil in the detail. Connected has profound implications."―New Scientist
"Intriguing."―SmartMoney.com
"Connected explores the startling intricacies of social networks."―O, The Oprah Magazine
"Could well be one of the most important works of the decade. Full of fascinating stories and examples. A must read."―Ed Diener, Joseph Smiley Distinguished Professor of Psychology University of Illinois and author of Happiness
"In a social world exploding with new ways to interact, Connected is a user's guide for ourselves in the 21st century."―Dan Ariely, James B. Duke Professor of Behavioral Economics and author of Predictably Irrational
"A God's-eye view of social relationships that may make you dizzy. Every business leader, teacher, and parent should see their life from this vantage."―Chip Heath, coauthor Made to Stick
"A lively, well-written account of social networks and their power to shape our lives. The world becomes smaller and more meaningful after reading this engaging book."―Sudhir Venkatesh, author of Gang Leader for a Day
"The possibility that we all participate in one mind challenges religion, philosophy, and the meaning of life itself."―Deepak Chopra, San Francisco Chronicle
"[In a category of] works of brilliant originality that can stimulate and enlighten and can sometimes even change the way we understand the world."―The New York Times
"A clever, cogent, and enjoyable look at the latest thinking about humans in community. It provides a swath of important research in one place for readers and makes it a stimulating read."
―Michael Fitzgerald, Boston Globe
"An intellectual but accessible approach. The authors make a persuasive case for the power of social networks to affect everything and everyone."―Business Week
About the Author
Product details
- Publisher : Little, Brown Spark; Reprint edition (January 12, 2011)
- Language : English
- Paperback : 368 pages
- ISBN-10 : 0316036137
- ISBN-13 : 978-0316036139
- Item Weight : 11.9 ounces
- Dimensions : 5.5 x 1 x 8.25 inches
- Best Sellers Rank: #254,560 in Books (See Top 100 in Books)
- #223 in Sociology of Urban Areas
- #504 in Medical Social Psychology & Interactions
- #769 in Popular Social Psychology & Interactions
- Customer Reviews:
About the authors

Nicholas A. Christakis, MD, PhD, MPH, is the Sterling Professor of Social and Natural Science at Yale University, with appointments in the departments of Sociology, Ecology and Evolutionary Biology, Statistics and Data Science, Biomedical Engineering, and Medicine.
Previously, he conducted research and taught for many years at Harvard University and at the University of Chicago. He was on Time magazine’s list of the 100 most influential people in the world in 2009. He worked as a hospice physician in underserved communities in Chicago and Boston until 2011.
Nowadays, he spends most of his time in the Human Nature Lab, where his team explores a broad set of ideas, including: understanding the evolutionary, genetic, and physiological bases of friendship; encouraging villages in the developing world to adopt new public health practices (working in locations in Honduras, India, and Uganda); mapping social networks in settings around the world; arranging people into online groups so that they behave better (such as being more cooperative and more truthful); developing artificial intelligence that helps humans address challenges in collective action; exploring the effect of social interactions on the human microbiome; and more. When he is not in the lab, he teaches at Yale University.
Christakis was elected a Fellow to the National Academy of Medicine of the National Academy of Sciences in 2006, to the American Association for the Advancement of Science in 2010, and to the American Academy of Arts and Sciences in 2017.

James H. Fowler earned a PhD from Harvard in 2003 and is currently a Professor at the University of California, San Diego. His work lies at the intersection of the natural and social sciences, with a focus on social networks, behavior, evolution, politics, genetics, and big data.
James has been named a Fellow of the John Simon Guggenheim Foundation, one of Foreign Policy's Top 100 Global Thinkers, TechCrunch's Top 20 Most Innovative People, Politico's 50 Key Thinkers, Doers, and Dreamers, and Most Original Thinker of the year by The McLaughlin Group. He has also appeared on The Colbert Report.
His research has been featured in numerous best-of lists including New York Times Magazine's Year in Ideas, Time's Year in Medicine, Discover Magazine's Year in Science, and Harvard Business Review's Breakthrough Business Ideas.
James wrote a book on social networks for a general audience called Connected. Winner of a Books for a Better Life Award, it has been translated into twenty languages, named an Editor's Choice by the New York Times Book Review, and featured in Wired, Oprah's Reading Guide, Business Week's Best Books of the Year, and a cover story in New York Times Magazine.
Customer reviews
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Learn more how customers reviews work on AmazonCustomers say
Customers find the book's information fascinating and thought-provoking. They describe it as an excellent, well-written read with interesting examples related to politics, emotions, altruism, diseases, and more. Readers appreciate the graphs that show network connections between individuals. Many consider the book worthwhile for their time and energy, offering new cost-effective public-health interventions. However, opinions differ on the narrative quality - some find it powerful and compelling, while others feel it lacks cohesion and repetitiveness.
AI-generated from the text of customer reviews
Customers find the book well-written and engaging. They describe it as an interesting read that uses stories to illustrate complex ideas. Readers say the book is easy to understand, with smart writing and clear concepts. Overall, they find it a promising read.
"...book twice since its publication, I found reading "Connected" very delightful since it presents a constellation of thought-provoking, and sometimes..." Read more
"...In short, a fascinating book. I do have a nit to pick with it though...." Read more
"There are plenty of good books out there. Books that are fun to read and that actually provide useful information...." Read more
"...Probably one of the most eye opening books this year impacting every facet of our home, work and social lives and shows the potential power these..." Read more
Customers find the book's information fascinating and thought-provoking. They appreciate the extensive collection of studies that support the book's conclusions. The authors discuss interesting examples related to politics, emotions, altruism, diseases, and more. The book takes everyday concepts and makes you think of them in new ways, with profound implications for understanding human behaviors. It cites studies to explain things you've likely noticed.
"...The authors assert that social networks are important not only because of the effect others have on us but also because of the effect we have on them..." Read more
"...The book was just filled with highly interesting facts about how your network influences you. Also, how you can influence your network...." Read more
"...different perspective (a network perspective), but also robust, quantitative data from the real world, Christakis and Fowler will change the way you..." Read more
"...The authors discuss many interesting examples related to politics, emotions, altruism, diseases, etc.,..." Read more
Customers find the book intriguing and informative about connectivity. They appreciate the graphs showing network connections between individuals and the blogosphere of Iran. The book provides a good introduction to the power of networks in personal and professional life. Readers also mention that interpersonal relationships are more important than they think.
"...are striking similarities between the nature and extent of connections within the human brain and those that occur within social organizations such..." Read more
"...Connected is a true masterpiece, not only for social scientists, but for everyone." Read more
"...There are a number of cool graphs in the book that show network connections between individuals, the blogosphere of Iran, political blogs, etc that..." Read more
"Connected is a very intriguing book that makes you aware of situations or events that can affect you even though you weren't there...." Read more
Customers find the book worthwhile. They say it's a substantial piece of work that offers cost-effective public health interventions.
"...-network perspectives can offer a whole new set of cost-effective public-health interventions...." Read more
"...influences makes it surprising, even shocking in parts, and worth buying...." Read more
"...Still though, definitely worth reading!" Read more
"...sporadically dense and repetitive but remains overall, worth the reader's time and energy." Read more
Customers have different views on the narrative quality. Some find it powerful, reframes old stories about how people influence each other, and draws parallels between occurrences that seem unrelated. Others feel it's repetitive, lacks a cohesive narrative, and oversimplifies the topic without providing much context or connection.
"...but after a while, it starts to feel more of the same and somewhat repetitive...." Read more
"...from original research reveal hidden influences among us and reframe old famous stories about how people influence each other indirectly and..." Read more
"...bit out of focus, jumpîng from subject to subject without providing much context and connection but taking these imperfections into account I can..." Read more
"...is informative and well-researched, it is sporadically dense and repetitive but remains overall, worth the reader's time and energy." Read more
Top reviews from the United States
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- Reviewed in the United States on October 12, 2009"Connected" by Nicholas Christakis and James Fowler is one of the most important books you will ever read. In this insightful and thought-provoking book, the authors explore our social networks and their powerful shaping role in our daily lives. The authors show that the powerful role of social networks obeys the Three Degrees of Influence Rule, meaning that our behaviors have impact on our friends, our friends' friends, and our friends' friends' friends. This amazing fact can be applied to human experience as diverse as happiness, loneliness and other emotions, political views, sex, and health. For example, happiness can spread through social networks from person to person to person, and our health behaviors can affect those of our friends, our friends' friends, and even our friends' friends' friends.
As I perused this book twice since its publication, I found reading "Connected" very delightful since it presents a constellation of thought-provoking, and sometimes counter-intuitive, ideas on social networks. We can enjoy the book solely for the purpose of enhancing our knowledge. But I think this book is much more than that and has meaningful implications in various ways. First and foremost, the book has very important implications for policymakers. For instance, as the authors articulated in Chapter 4, social-network perspectives can offer a whole new set of cost-effective public-health interventions. This innovative approach is particularly relevant at a time when soaring costs of health care are a major issue and health care reform is gaining momentum. Many policymakers now know that nudging is important, but they don't know how to implement it. This book provides a good answer.
Second, "Connected" has significant implications for academia as well. Efforts to understand human behavior have been confined to a long debate of individualism versus holism. This book offers an entirely different way. By studying social networks, the authors suggest, we can find the missing link between the two perspectives. In other words, through the investigation of how emergent properties arise and exert influence on our lives, we can truly understand human condition and behavior for the first time. This is almost a manifesto, calling for a change in the traditions of "either or approach" between individualism and holism towards "both and approach" by means of the solid bridge offered by social networks that could resolve the chasm. Such a manifesto is convincing and has a strong stance because it is soundly supported by the thoroughly researched evidence from the authors and others.
Finally, this book has meaningful implications for each and every individual because we are all embedded in our social network (both real-world and online network). The fact that we are all connected to others through social networks is significant to us partly because such networks influence us in every aspect. So after reading this book, some may behave differently so that social networks can have positive influence on them. For example, we may try to make friends with happy, slender and rich people. But I think that is not far from a kind of social determinism. Rather, what this book repeatedly stresses is the importance of our own role in social networks--the surprising power of us as humans and how we shape our social networks. The authors assert that social networks are important not only because of the effect others have on us but also because of the effect we have on them. In this sense, being embedded in social networks is a matter of our social responsibility with strong commitment to creating and enhancing public goods. This book thus teaches us one of the most important truths of our life that we are responsible for, and should take care of, others.
Whether you are a policymaker, scientist or everyman like me, if you want to understand who we are and what we must do to be truly human, "Connected" is a must-read. If you are to read just one book this year, this is the one.
- Reviewed in the United States on May 15, 2015The premise of the book is pretty simple. You have close friends and acquaintances. Your close friends and acquaintances also have friends and acquaintances, that may or may not over lap with yours. Those people also have another set of friends and acquaintances. And here's the kicker, that third layer, not your friend, or your friend's friend, but your friends friends friend can affect your daily mood, the amount of exercise you do, whether or not you smoke, your involvement in crime, all sorts of things. The book sets out to prove it. Along the way you also learn about things like why you probably only have somewhere between 3-8 close friends. Why you probably don't have more than about 100 people that you communicate with regularly (uh, but what about my 7,000+ Twitter followers?). How these are to a degree biological factors hardwired into you. Most interesting of all is how the ripples just fade away at the third layer, over and over again throughout their studies and their testing.
The book was just filled with highly interesting facts about how your network influences you. Also, how you can influence your network. It also matters the type of network that you have. Are you connected to lots of people that aren't connected to each other, weak ties, or are you connected to lots of people that are all connected to one another, strong ties. Each of these types of networks influences you differently. Your behavior within a network is probably following one of three paths; cooperator, you're willing to help others, free rider, you're letting others do the heavy lifting, enforcer, you're making sure everyone follows the rules. Your behavior is also likely to shift between those roles depending on who you're interacting with and when.
In short, a fascinating book. I do have a nit to pick with it though. At the end of it all, I have a great set of information about what a strong network would look like. I get a good sense of why I would want to have a strong network. Nothing about how to really get a strong network other than making sure my friends are connected with my friends and that my friends, and as much as possible their friends and their friends, are all on a positive path. Right. I'm sure that's easy to work out. Guidance around this network thing would have been nice.
Top reviews from other countries
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Luis CastellanosReviewed in Spain on December 23, 20225.0 out of 5 stars Si buscas algo fuera de contexto.
Bastante bueno para expandir la mente.
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DaveGCReviewed in Mexico on October 11, 20185.0 out of 5 stars Altamente recomendable!
Excelente libro
pkReviewed in India on September 13, 20195.0 out of 5 stars Must read book.
Never thought this book would explain life relations so easily. This is what I consider no-bullshit book.
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Alex_KoslowskiReviewed in Italy on April 29, 20195.0 out of 5 stars Un buon libro
Il libro è molto ricco di dettegli ed esempi che spiegano perfettamente ciò che gli autori intendono. Oltre agli esempi ci sono anche molte illustrazioni che facilitano l'esplicazione di alcuni esempi.
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NinjaReaderReviewed in Brazil on December 1, 20173.0 out of 5 stars Repetitive
I considered the central idea and theme very, very interesting, but the way the writer conveys his thoughts is repetitive and boring. The book could be shorter and then it could leave us wanting more. Sometimes, less is more. But a good read anyway.







