Sociology is the scientific study of social life, social change, and the social causes and consequences of human behaviour. Sociologists investigate societies, the structure of groups, organizations, and social institutions and processes, and how people interact within these contexts It provides various empirical tools and analysis of how and why society functions, the impact of social institutions on individuals/ groups, and the challenges of social interaction among individuals and within the larger social, political, religious and economic context in society. Since all human behaviour is social, sociology provides many distinctive perspectives on the world, generating new ideas and offering a range of research techniques that can be applied to practically any aspect of social life: socialisation and delinquency, unemployment, how people express emotions, education reform, how families differ and flourish, or problems of peace and war. Because sociology addresses the most challenging issues of our time, it is rapidly expanding field with many specialty areas: Family, Community, Social Class, Education, Health, Religion, Medicine, Ageing, Industrial Relations, Work, Science/ Technology, Ethnicity, Gender/ Sex, Development, Sports, Culture, Politics, Chieftaincy, Law and Justice, Policing, Military and Migration.