The book Foundations of Social Relations: A Study of Ethnic Psychology by author Daniel D. Brinton is an in-depth study of the influence of ethnicity on social relations. In his work, the famous psychologist analyzes the psychological aspects of interaction between representatives of different ethnic groups, considering the influence of cultural characteristics on the formation of relations in society. The book provides the reader with an opportunity to understand and analyze complex social dynamics that arise at the intersection of various cultural and ethnic factors. Giving priority to psychological aspects, the author helps to reveal the essence of interaction between people of different ethnic groups in modern society.