Epicurus said that there were no rewards and punishments after death because there was no one out there to reward or punish you. The idea of hell-fire and damnation are fairy tales designed by control freaks to make you conform, be a good dutiful citizen, refrain from complaining about such minor matters as corruption and establishment law-breaking, and to keep you firmly in your place. Without threats it was felt that anarchy would ensue.
This all seems so blatantly obvious that I feel almost embarrassed to state it in public! Of course, you will say! Or ought to, anyway.