This is a religious question, which followed a brain-hurty conversation with a religious friend: when did animal sacrifices fall out of fashion? Was it a gradual thing, or all at once? (I'm specifically asking about Judeo-Christian tradition, here, but it can apply to pretty much any religion since sacrifices seem to have been pretty prevalent way back when.) My friend's stance is that Christians consider Jesus to have been the ultimate sacrifice and thus we no longer have to buy doves at the temple to sacrifice them - but if that were the only change, wouldn't modern Jews still have to sacrifice things?
(I really don't want to start a religious flame war or anything, but I really am curious!)