" The evidence that much of what divides us is rooted in our biology was compiled by the evolutionary anthropologist (and Peruvian political adviser) Avi Tuschman, in his transdisciplinary work Our Political Nature, in which he identifies three primary and relatively permanent personality traits running throughout political beliefs: tribalism, tolerance for inequality, and one’s view of human nature. "

― Michael Shermer , The Moral Arc: How Science and Reason Lead Humanity toward Truth, Justice, and Freedom