The Nation of Islam (NOI) promoted black nationalism and racial separatism beginning in the 1930s. Led by Elijah Muhammad, the NOI emphasized economic self-sufficiency, cultural pride, and moral propriety as keys to black liberation. It established businesses and temples that gave the NOI great influence in urban black communities. The NOI's message of racial pride and its focus on incarcerated black men made it appealing. Through the NOI, black nationalism became an important strategy within the broader black freedom struggle.