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The closeness of our genomes is perfectly reasonable in the time frame involved. Remember you have a handfull of genetic changes different from your parent in only one generation. How many can pile up in a quater of a million generations? This will accelerate when we are separated by a species barrier.
Would it be logical to assume that if another species were to develope off of the human one, it is now less likely because of our ability to travel globally with ease and so the potential of a human group being isolated is less likely?
I assume this is how humans and Chimps evolved according to what you are saying. They started out with the exact same genetic information pool but then as the group's population increased, it broke up and spread, perhaps to find more food, and then evolution took one group in the dirrection of Chimps because of the enviorment, and the other group went human because that worked better for that enviorment. Perhaps there were several other groups that themselves became different hominoid species but they failed to survive for whatever reason?
So evolution from the human perspective is stopped until either our species experiences some factor that can preserve isolatin of groups or space exploration can isolate a population group via distance. Am I on track or did I over simplify the evolutionary model at the species split of Chimps and humans?
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