I Have a Couple of Questions

Is there a global network of Nationalist terrorism? An innately human system tending toward militant Tribalism? Is there a widely held belief that humanity is genetically designed to live in a world of homogeneous cultures*, isolated from and hostile to other cultures, and entitled to dominate, exploit and destroy other cultures by the virtue of might in the guise of need?
What is the basis for such a system? Are there valid scriptures declaring the intentions of superhuman beings or forces for such a system? Is there historical, anthropological or archeological evidence that demonstrates the relative success of species populations who enjoy better survival status when they break into competing groups – tribes? Is there evidence that localized packs or tribal groups are more genetically stable when they do not incorporate genetic material from outside their tribe? Is there any philosophical, psychological or medical evidence that militant conflict improves the quality of life for the greater number of members of the tribe?
Is there any authoritative documentation, historical evidence or demonstrable rational that supports the superiority of the tribalist world? And if not, what drives such a wide spread and apparently sociopathic delusion?
Oh, make no mistake about it: I have answers to these questions. I think more people need to ask themselves these questions, and be prepared with answers to them.

*Culture: a community of people who share language, traditions and beliefs, which may or may not include the belief in a right to a certain geographic space and a qualification of “racial” purity as defined by certain physical characteristics. Such a community could be called a tribe or nation.