When satan and his followers were cast out of heaven? Just a guess.
FMCDH(BITS)
No doubt that hell has been contesting for control over the earth since that very day; but I believe it was sometime in the 20th century that evil spread all over the earth as the worst wars in man's history took place, abortion became a "right", narcissism became a value, patriotism became a crime, marriage became a game, the Courts became God, and almost every crime of perversion, pornography and sexual deviancy became legal.