This chapter examines post-positivist approaches in international relations (IR). Post-positivism rejects any claim of an established truth valid for all. Instead, its focus is on analysing the world from a large variety of political, social, cultural, economic, ethnic, and gendered perspectives. The chapter considers three of the most important issues taken up by post-positivist approaches: post-structuralism, which is concerned with language and discourse; post-colonialism, which adopts a post-structural attitude in order to understand the situation in areas that were conquered by Europe, particularly Africa, Asia, and Latin America; and feminism, which argues that women are a disadvantaged group in the world, in both material terms and in terms of a value system which favours men over women. The chapter concludes with an overview of criticisms against post-positivist approaches and the post-positivist research programme.