Agassiz was haunted by his encounters with blacks when he arrived in the United States. His very first experience meeting black people as servants in a Philadelphia hotel in 1846 was so unsettling that he wrote at length about it in a letter to his mother. “I can scarcely express to you the painful impression that I received, especially since the feeling that they inspired in me is contrary to all our ideas about the confraternity of the human type and the unique origin of our species,” he wrote. Describing blacks as “a degraded and degenerate race,” Agassiz confessed, “it is impossible for me
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