I believe that the prevailing and most common pattern of human behavior and interaction between groups of humans has been that a group of humans with an advantage have used that advantage to disenfranchise any disadvantaged group they interact with. 

I don’t think this has always been the case and I don’t believe it is the best choice, but I think it has been the dominant pattern.  And, I mean dominant pattern in multiple ways, the pattern of using advantage to dominate has been the most common or dominant decision of an advantaged group. 

I think the dominant pattern worked against the interests of [1] neanderthals when they started bumping into cro-magnons a while back and I think the neanderthals largely departed this mortal coil in that process.  The record also suggests that changing global weather greatly changed the terrain where neanderthals lived.