There's an evolutionary imperative why we give a crap about our family and friends. And there's an evolutionary imperative why we don't give a crap about anybody else. If we loved all people indiscriminately, we couldn't function.

About David Viscott

David Steven Viscott (May 24, 1938 – October 10, 1996) was an American psychiatrist, author, businessman, and media personality. He was a graduate of Dartmouth (1959), Tufts Medical School and taught at University Hospital in Boston. He started a private practice in psychiatry in 1968 and later moved to Los...