Is there a way of freeing humankind from the threat of war? Can human aggression be channeled to help protect people against the impulses of hatred and destruction? These questions were put to Sigmund Freud in an anxious letter from Albert Einstein dated…

The text below is a slightly abridged version of a letter written by Albert Einstein to Sigmund Freud. Under the title Why War?, the letter and Freud's reply to it were published in 1933 by the International Institute of Intellectual Cooperation. They formed…