Weinberg’s rise was inexorable. Early on, he was asked to carry a flagpole on the trolley uptown to the Sachs family’s town house. The door was opened by Paul Sachs, the grandson of the firm’s founder, and Sachs took a shine to him. Weinberg was soon promoted to the mailroom, which he promptly reorganized. Sachs sent him to Browne’s Business College, in Brooklyn, to learn penmanship. By 1925, the firm had bought him a seat on the New York Stock Exchange. By 1927, he had made partner. By 1930, he was a senior partner, and for the next thirty-nine years—until his death, in 1969—Weinberg was Goldman Sachs, turning it from a floundering, mid-tier partnership into the premier investment bank in the world.