Don't Bother Me, I Can't Cope was an all-black musical that was notable for not only being written entirely by a black woman (Micki Grant who also appeared in the original production) but also for being the first Broadway show directed by a black woman.
The show focuses on economic and racial injustice and the African-American experience with songs on such topics as tenements, slumlords, ghetto life, student protests, black power, and feminism. The music is a mixture of gospel, jazz, funk, soul, calypso, and soft rock and of course spoken word, one of the ancestors of rap music.
Source: Amsterdam News, Theater Jones, Wikipedia