Crash Course: World History2012

John Green:
Dear Ichthys, So check this out: In the first century when it was still super underground and hipster to be a Christian, you were a secret symbol of Christianity, used to kind of hide from the Romans. Ichthys, the Greek word for fish, was an acronym and it was a super clever way to talk about religion without anyone knowing that you were talking about it. But you'll never guess what happened - even in places where it's completely fine to talk about Christianity now and to use, you know, regular Christian symbols, like the cross, you have had a huge resurgence thanks to the plastic automobile decal industry. I mean seriously, Ichthys, I haven't seen a comeback like this since Jesus.