1. He helped leading all the African American people to the same target, thru the creation of different organizations.
2. Contributed to African American communities to find themselves with their own African past, studying their languages and their culture and promoting this behavior in schools.
3. He created Kwanzaa, a holiday for African Americans and their culture.
4. He was able to rejoin African American parties and put an end to their differences.
5. He influenced most of the African American Leaders of his age.
Source:
http://blackpower.web.unc.edu/2017/04/mal/