As Facebook turns 20, politics is out; impersonal video feeds are in

“I’m a little intoxicated, not gonna lie. So what if it’s not even 10pm and it’s a Tuesday night?…Let the hacking begin.” So typed a 19-year-old Mark Zuckerberg, liveblogging from his Harvard dormitory as he began work on a website called Facemash. The site displayed randomly selected pairs of students’ mugshots, harvested from the university’s intranet, and allowed users to vote on who was hotter. It caused a stir and was promptly shut down. But before long, a successor was in the making. On February 4th 2004 Mr Zuckerberg launched a...