Focusing on his life and academic production, especially the long eleven years that he spent in the United States, in this text I explore the complex relation between the first President of the Mozambique Liberation Front Eduardo Mondlane and the social sciences - the academic world of sociology and anthropology. I do so through an analysis of the correspondence between Mondlane and several social scientists, especially Melville Herskovits, the mentor for his master's and doctoral degrees in sociology, and Marvin Harris, who followed his famous study of race relations in Brazil with research in Lourenço Marques in 1958 on the system of social and race relations produced under Portuguese colonialism. My main argument is that his academic training bore on Mondlane's political style more than normally assumed in most biographical accounts.