Ch. 1. Defining the social group -- ch. 2. Studying groups scientifically -- ch. 3. Groups and their function -- ch. 4. Social influence -- ch. 5. Social categorization -- ch. 6. Group development and structure -- ch. 7. Power and leadership -- ch. 8. Group decision making -- ch. 9. Group performance and productivity -- ch. 10. Effective working groups -- ch. 11. Cultures, social change, and crowds -- ch. 12. Cooperation and conflict within groups -- ch. 13. Cooperation and conflict between groups.