David Blumenthal, a good and wise friend who is a Jewish studies professor and a rabbi wrote me recently asking about the former adaptiveness and present maladaptiveness of xenophobia. The operative passage in his letter was, “In the global world, however, survival requires the cooperation of varying and different groups. Humanity, in its groups, cannot survive without the quintessential other. Xenophobia has ceased to be adaptive. So has antisemitism, racism, orientalism, and misogyny.”

I have little trouble agreeing that at some times in the past these behaviors were adaptive for the perpetrators. Read more