Over 400,000 people visited Farnam Street last month to learn howto make better decisions, create new ideas, and avoid stupid errors. With more than 100,000 subscribers to our popular weekly digest, we've become an online intellectual hub. To learn more about we what do, start here.
The Surprising Power of Our Social Networks and How They Shape Our Lives
A lecture by Harvard Professor Nicholas Christakis on face-to-face social networks, what they mean to our lives, and how they effect us. Our social networks have the power to spread obesity — or happiness — like contagion.
If you’re friends are obese you have about a 45% higher likelihood of being obese yourself. If your friends’ friends are obese you’ve got about a 25 % higher likelihood. If your friends’ friends’ friends are obese you have about a 10% higher likelihood. And it’s only when we get to your friends’ friends’ friends’ friends at 4 degrees of separation that there is no longer a relationship between that persons body size and yours. … this observation holds for lots of other traits, not just obesity.