The document discusses various approaches to defining religion, including substantive definitions that explain what religion is (e.g. a unified system of beliefs about sacred things), functional definitions that explain what religion does (e.g. helps groups struggle with problems of human life), and social constructionist definitions that see religion as interpreted differently by different groups. It also evaluates these definitions and their limitations. The document then discusses theories about religion from thinkers like Durkheim, Marx, Weber, and the relationship between religion and science based on theorists like Comte, Lynch, Polanyi, and Popper. It examines different theories of religion including functionalism, Marxism, and interactionism. Finally, it discusses feminist theories of religion, religious organizations