Who is the most influential person in Internet history? That argument could go on for years. But you could make the case that one guy with a pencil has the strange power to make things happen without a company, without a title, and without even asking. Randall Munroe has influence he never asked for. His creation xkcd is "A webcomic of romance, sarcasm, math, and language." The accompanying blog, which Munroe calls a "blag," is where he posts everything outside of the thrice-weekly comic. He's published several books, too, but it's the comic that seems to have the biggest impact. This is an expanded and updated version of a post I did several years ago for mental_floss.