It seems humans, shackled to their clan legacy, are unable to break from the hard wired needs to be close to their own kind and far from the rest. What is ironic is that for most of their history – from 100,000 years to 10,000 years – the characteristics they used to identify clan membership included know-how and family ties. Modern humans, while maintaining the desire to segregate, have found much less substantial aspects to segregate – such as the color of skin and political affiliations. And recently, they have overlaid that with even more meaningless attributes – such as religion and location.
Those holding out for a more peaceful world, should understand that humans are ill-equipped to rise above the legacy they have been handed. In an attempt to rationalize it, they seem to have made it worse.