I think he will go to a good spot appropriate for him.If a person is an atheist and he had lived his life as a good, honest and hardworking person, always helping other people, loving his family and friends and not having evil thoughts about anyone or anything and eventually he dies-my question is: where does his soul goes-to the heaven or to hell?
And I don't see it as a black/white or heaven/hell afterlife. The universe is infinitely more sophisticated.