"Philosophy of Betrayal. About Individualism and Collectivism" is a work that explores the complex relationship between the individual and society, between loneliness and community. The author offers the reader to delve into the study of the mechanisms by which people choose their path - to be independent individuals or to give preference to collective values. The book carefully examines philosophical concepts, attempts to solve this dilemma by famous philosophers, psychologists and sociologists. Is it possible to achieve harmony between individual freedom and responsibility for the common cause? Can a compromise in this matter become a source of new discoveries and development? In the book "Philosophy of Betrayal. About Individualism and Collectivism", the author poses interesting questions to the reader, offering to reflect on the complexity of choosing between solitude and community.