Adolescent Years and the Principle of Least Action
These were troubled times when Richard Phillips Feynman was born in New York on May 11, 1918. In Europe, the First World War was still raging and had already cost the lives of countless people. The United States had entered the war about a year earlier (in April 1917), and this would ultimately lead to victory over Germany, although it would still take until November 1918 before the war was brought to an end. Fortunately, Feynman’s family was not directly affected by the war.