Answer:
Look at my explanation
Step-by-step explanation:
Well you have a bit of a problem here because a few people tried to do that. But not to worry I'll give a brief history of the two most important figures regarding pan Africanism.
1. Marcus Garvey:
Marcus Garvey believed that all Africans in the western countries need to start establishing Black states all around the world notably in Liberia on the coast of West Africa.
2. Elijah Muhammad
Garvey could very well be the answer but Elijah Muhammad is definitely up there. You see, Elijah Muhammad like many others was influenced by Marcus Garvey. In a way he actually achieved a black state in Harlem. Almost everyone in the Nation of Islam territory was Muslim and EVERYONE was black. They had their own schools, universities, restaurants, cafes, taxicabs, mosques. And Elijah Muhammad managed to build dozens of temples all around the U.S. in the name of the Nation of Islam. This does sound a lot like a nation doesn't it. Especially considering Elijah Muhammad was like the king of this nation. At the end of his life he was said to be a multi-millionare due to all the funding from his followers and the profit made from the cafes and restaurants all over America.
So althought Marcus Garvey popularized the idea Elijah Muhammad went ahead and did it. Hopefully this helps.