What if life on planet earth is a duality incarnation? Say there is life on many worlds, and some of these worlds fit our definition of "heaven" and some fit our definition of "hell". In saying this you may also be saying that negativity, in large part, may be incapable of existence due to the laws of physics on some worlds. Conversely, the physics conditions of some worlds may make it impossible for anything "good" to ever manifest. This of course places our world somewhere between the scales, where incredible beauty and grace is counterpointed by a depth of evil and brutal hardships which shocks the senses. This is purely me talking, but the theory is also put forward by the universe-people group of Czech republic. I think it's the most logical amalgamation of every world religion and even what NASA tells us about deep space. Maybe each culture and god exists on one world, yet on this one we all co-exist because this life is meant to be a training ground and learning experience for the soul. I think what they are saying is more than evident, accounts also for reincarnation and gives purpose and meaning to life, the universe and everything.