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In the context of the question about individuals who supported and advocated for polygenism, here are the correct responses:
1. David Walker: Did not support polygenism. He was an African-American abolitionist who advocated for the end of slavery and equal rights for all individuals.
2. Henry Moss: No historical references support Henry Moss as a figure who advocated for polygenism.
3. Samuel Stanhope Smith: Did not support polygenism. He was a Presbyterian minister and educator who rejected the idea of different human races having separate origins.
4. Thomas Jefferson: He supported a form of polygenism, believing in the theory that different races had separate origins. Jefferson argued that African Americans were intellectually inferior to white Europeans.
Therefore, Thomas Jefferson is the individual from the list who supported and advocated for polygenism.