Several attempts to found "Negro" leagues (to use the term that was in use at the time) met with limited success. Following World War I, however, a number of factors contributed to the founding of the Negro National League, which was to be successful. After the war, America saw an increase in racial tensions, which led to a resurgence of the Ku Klux Klan, violent attacks on black-owned businesses and institutions, and renewed barring of African-Americans from white institutions. In response to this, [Marcus Garvey]? advocated black separatism and urged the development of black-only businesses and institutions.
Against this background emerged a remarkable and energetic man, Rube Foster, a talented ballplayer himself who had been unable to play professional baseball in the United States.
(will continue with the founding of the league in 1920... stay tuned)
(also need to discuss Satchel Paige, [Josh Gibson]?, [Oscar Charleston]?, [Cool Papa Bell]?, and other Baseball Hall of Famers who played in the Negro Leagues.)
Excellent sources