What makes us want to read and share on the internet?

This New Yorker blog answers many questions: Why do BuzzFeed and Upworthy posts jam my Facebook walls? And what makes me decide to read and share some of them?  Years ago, a Wharton School researcher started looking at the Wall Street Journal‘s most shared lists; now he looks at Facebook and other social media. His answers span the millenia. Even lowly personal bloggers like me might want to pay attention.