In this article, I argue that Sérgio Buarque de Holanda’s sociohistorical analyses of the formation of Brazilian society in Raízes do Brasil are based on a non-sociohistorical assumption. Holanda prioritizes the influence of the Portuguese colonizer on that formation based on a determinist-organicist standpoint. Although he also attributes deleterious traits to the Portuguese, he describes them as endowed with a consistent character able to adjust to adverse natural conditions and other ethnicities. As for African and Indigenous peoples, conversely, besides deprecating their temperament, Holanda reduces their influence to a peripheral and reinforcing function to the Portuguese temperament. Furthermore, he attributes the leading role in shaping Brazilian identity to the Portuguese. As I demonstrate, Holanda’s overvaluation of the Portuguese and his oversimplification of African and Indigenous peoples’ contribution to the sociohistorical development of Brazil reflect his view of peoples’ identities as naturally given, as organic-like features, and not as socially constructed.