Sociology is the systematic and scientific study of human groups, societies, social interactions, and the social forces that shape human behaviour, giving particular emphasis to the analysis of the industrialised world and modern complex societies. It is one of a group of social sciences, which also includes anthropology, economics, political science, and human geography, all of which share a common interest in understanding various aspects of human society, although they may focus on different dimensions or use different approaches. Sociology employs a diverse range of theoretical perspectives and research methods to investigate social phenomena at different levels of analysis, from micro-level interactions between individuals to macro-level patterns in social institutions and global processes, aiming to develop a deeper understanding of how societies function, how social change occurs, and how social life is organised and experienced by individuals and groups.