The Internet can sometimes feel intimidating and even dangerous, but I’m glad to report that the guy who got the thing started is very nice and approachable. Vint Cerf is also funny — early on he had a T-shirt made that said “IP on everything.” Cerf, a key architect of the network and its military predecessor, now works at Google as a telecom policy expert and traveling sage who regularly visits the company’s offices around the world. (Technically, he’s vice president and “chief Internet evangelist.”)