" Even unrelated members of a clan who exhibit such positive attributes trigger in our brains a moral pattern: (A) Og was nice to me, so (B) I should be nice to Og; and (C) if I help Og, (D) Og will return the favor. In The Mind of the Market I demonstrated that this effect can be seen between clans and tribes when they participated in mutually beneficial exchanges, also known as trade. Even in the modern world, opening trade borders between two countries tends to lower tensions and aggressions between them, and closing trade borders—imposing trade sanctions—increases the likelihood that two nations will fight. These are both good examples of moral patternicities that have worked for and against our species.3 "

― Michael Shermer , The Believing Brain: From Ghosts and Gods to Politics and Conspiracies How We Construct Beliefs and Reinforce Them as Truths