Ever since science and proven scientific facts gained prominence in societies, e.g. durin and after Renaissance Europe, religiousness began to fall and no new religions were created. Many religions were created at a time when people had no real concept of their existence, the universe etc.. I was watching a debate w/ Christopher Hitchens and he said religion was "our first attempt to understand the world around us" before we gained sufficient knowledge, though I suppose the religious answer to this would be that God was trying to teach us about the truth before we were capable of gaining it ourselves.
People who live their lives in the endless fear of the afterlife are likely to be more doomed than those who don't - imagine finding out your religion was wrong and another was right; suddenly you're put in the same position as those who didn't follow any religion or believe in the afterlife. If you play the game of stats, there is exactly the same chance of your religion being right as is the chance of non-religiousness being right. Though with the latter, you can have a much better life, that you are 100% certain exists, on Earth.