Organisational behaviour is the study of why people act the way they do in organisations. It examines commonalities between different types of organisations like businesses, the church, and the military, which all seek to control people through rules and incentives. The field draws from various theories in psychology, sociology, economics, and other disciplines to understand individual and group behaviour in organisational settings. It also takes a critical approach, examining power dynamics between groups like managers and unions or governments and citizens. The course will cover topics like leadership, decision making, motivation, and resistance to understand people and organisations.