we're all complex systems of the oldest cells on the world, we adapted over billions of years into bigger systems through trial and error, survival of the fittest. only the strongest survive until they reproduce until the older species runs extinct. this repeated billions of times. we may still evolve eventually, there is mutations out there and specific gene pools that are different, not to say we are all equal but some of us possess different pigment, etc. so there still is natural selection going on, some can be born with special abilities others may not have. its basically a big ongoing process of elimination, but our continents are so spread out that one race or "species" dominate, unless it was like WWII if the nazis won.
thats just a theory, but its the most rational thing ive come to think. theres still rapid evolution occurring in the congo river i think, or some river in africa. they've found electric catfish and all sorts of crazy animals. the world changes all the time, species go extinct but other species usually take their place in the food web. were just animals, religion tries to make us seem like were different than our cats and dogs but the only difference really is our brain development. science and religion should remain separate, but for those who are ready to stop living in a fairy tale, they should educate themselves instead of praying for someones forgiveness. not to say all religions have this aspect to them, but most do.