what Progressive Era leader wished to establish a new black nation in Africa comprised of resettled black Americans

Marcus Garvey.

Explanation:

The Progressive Era was the period from 1896 to 1916 focusing on the social and political reforms of America. This period also brought out reforms and 'revolts' from the African community in their belief of having a 'black' identity and being accepted as equals.

Marcus Garvey was one of the very first leaders of the American Black nationalist movement. Under his leadership, the demand for a black nation in Africa comprising of black Americans resettled in Africa began. He believed that black Americans must go back to their native homes and create a black nation instead of being under the whites.

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