I’m pretty sure it was to increase their wealth and power ! :)
I think it does not stand for anything specific
A key figure of the Harlem Renaissance, James Weldon Johnson was a man of many talents. Not only was he a distinguished lawyer and diplomat who served as an executive secretary at NAACP for a decade, he was also a composer who wrote the lyrics for "Lift Every Voice and Sing," known as the Black national anthem.
