Interesting, and well done.
And I don't think this edition of Homo Sapiens Sapiens will ever get to the stars for the very reasons you mention. The ideas of division, competition and fighting for territory are built into our very genes. Mankind must grow through that stage of growth, and the adolescent fighting stages appeals to egos.
When has mankind not engaged in war, if not foreigners then internally with sects and some other divisions. Life has been cheap.