Harrow graduate Stanley Baldwin wrote that when he became Prime Minister before World War II, he wanted to have six Harrovians in his government. "To make a cabinet is like making a jig-saw puzzle fit, and I managed to make my six fit by keeping the post of Chancellor of the Exchequer for myself".[37] Up to the war, the role of public schools in preparing pupils for the gentlemanly elite meant that such education, particularly in its classical focus and social mannerism,[clarification needed] became a mark of the ruling class.