Our evolutionary lineage spent ~2,000,000 years as bi-pedal, forward vision, omnivorous pack hunters.  While the Molecular Biology of genotypic human behavior is locked in the Known/Unknown region we Know there is a hard-ish limit for the number of people any individual can maintain stable meaningful social relationships.

Dunbar's Number

Bottom Line: until the genetics of Genotypic Human Behavior changes Human Behavior will remain in the range to which we've become accustomed and when the genetics does morph enough to change Genotypic Human Behavior the result won't, by definition, be Human.  

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre