Buddhists and Hinduists believe in rebirth. But as far as I know, they can't answer this question: When in your future life you can't remember this life, it doesn't matter what the consequence of your acts are in your future life. you will be born totally a different person with no recall of the past. So why should you do something which you get its result in the next life? Without recalling the past lives, the idea of rebirth is useless.