Nicholas A. Christakis

“Realizing the ways in which we humans may have been inadvertently changing our genes for millennia provides a way for us to begin to think about the inevitable genetic revolution in medicine that is going to allow us to advertently change our genes over centuries and even decades.”

“Just because we say networks are important doesn't mean that networks explain everything. We're just adding additional information. Networks don't work like a match - they work like a magnifying glass.”

“We cannot understand our humanity just by studying individuals.”

“People have just assumed that... if we call our Facebook acquaintances our friends, we must be influenced by them, too. But we're not.”

“I like to have met someone in real life before being their Facebook friend.”

“We will create life from inanimate compounds, and we will find life in space. But the life that should more immediately interest us lies between these extremes, in the middle range we all inhabit between our genes and our stars.”

“We're not just social animals in the conventional way that people think. It's not just a bunch of us who hang out together. We have a very specific pattern of ties, and they have a particular shape and structure that is encoded in our genes. It means that human beings have evolved to live their lives embedded in social networks.”

“The social sciences offer equal promise for improving human welfare; our lives can be greatly improved through a deeper understanding of individual and collective behavior. But to realize this promise, the social sciences, like the natural sciences, need to match their institutional structures to today's intellectual challenges.”

“We are, first of all, not solitary creatures and second of all, we are deeply embedded in the lives of others. It's very easy to forget that and to engage in an atomistic fallacy - where we think that all we have to do is study the individual components of a system in order to understand the system.”

“My entire youth was spent with an incredibly ill parent... I don't think you can grow up that way and not be marked by that experience.”

“Whether we appreciate it or not, we live out our lives surrounded by an intricate pattern of social connections... We're all embedded in this network; it affects us profoundly and we may be unaware of its existence, of its effect on us.”

“Everyday interactions we have with other people are definitely contagious, in terms of happiness.”

“What constrains or enables the capacity of human beings to work in groups is not so much the technology, but rather the capacity of the human brain to have and monitor social interactions.”

“It is well to look around at whom, and not just what, surrounds us. Population structure will change everything. Our health, wealth, and peace depend on it.”

“It's important for students to take their studies seriously.”

“We and others have done a bunch of work to show that if your real friends online say or do something, it affects you. But if your acquaintances online say or do something, it does not. People on average have about 106 Facebook friends, but only 5 or 6 real friends.”

“It used to be thought that our genes were historically immutable and that it was not possible to imagine a conversation between culture and genetics.”

“The reason we form networks is because the benefits of a connected life outweigh the costs. It's to our advantage as individuals and a species to assemble ourselves in this fashion.”

“There are very fundamental reasons we live our lives in social networks, and if we really understood the role they're playing in our society, we would take better care of social networks and find ways to take advantage of their power to improve our society.”

“Social networks are these intricate things of beauty, and they're so elaborate and so complex and so ubiquitous that one has to ask what purpose they serve.”