As technology accumulates and people in more parts of the planet become interdependent, the hatred between them tends to decrease, for the simple reason that you can't kill someone and trade with him too.

1126/science. ; Pinker S. Criticism
The Language Instinct has been criticized by Geoffrey Sampson in his book The 'Language Instinct' Debate.

Steven Arthur Pinker (born September 18 1954) is a Canadian-born experimental psychologist cognitive scientist linguist and popular science author. In his popular books he has argued that language is an "instinct" or biological adaptation shaped by natural selection.