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Think about what the homo sapien will evolve into in 1 million years.
Crazy.
I don't think you understand how evolution works. We don't have much natural selection weeding out humans without certain qualities thus causing us to evolve. The only evolution I could think of happening would be more of an "idiocracy" style evolution where it is cultural and cultures that reproduce less will eventually die out and ones that make more babies prosper. But were not gunna be evolving gills and built in jetpacks.
How do you know what we will or won't evolve into?
You don't think the leap into agriculture and rapid growth of technology has anything to do with evolution? How did that happen? Or why did that happen?
If man requires computers to do all the work, what will we evolve into? You don't think that we will have a different physical appearance after another 100 years? 1000 years? 10,000 years? Only culture evolves? What about inside our body? Nervous system, immune system, our senses...
You're very right on culture being an ongoing process, language is the biggest supporter of that. But we are able to build computers because we have an opposable thumb. And nothing on this planet has that ability, and if over time we start letting computers do all the work, and humans are doing less manual labor and thinking....then what?
Also consider all the synthetic and non organic implants we have in medicine, surgery, rehabilitation, etc.. And interbreeding between races. Who knows...
I'm definitely not an expert on evolution but I know all the serious discussions around it deal mostly with genes, dna, mutation, brain size, and fossils.