Rickey's most memorable act with the Dodgers involved signing Jackie Robinson, thus breaking baseball's color barrier, which had been an unwritten rule since the 1880s. This policy had continued under a succession of baseball leaders, including Landis, who was openly opposed to integrating Major League Baseball for what he regarded as legitimate reasons. Landis died in 1944, but Rickey had already set the process in motion, having sought (and gained) approval from the Dodgers Board of Directors in 1943 to begin the search for "the right man."