The term ecology is derived from the Greek words oikos (meaning 'house', 'dwelling', or 'habitat') and logos (meaning 'study of' or 'discourse'). Coined by the German biologist Ernst Haeckel in 1866, ecology originally denoted the scientific study of the interactions between organisms and their environment. When extended to sociology, human ecology explores how human social groups adapt to, modify, and depend upon their physical and biological environments.
- Environmental Determinism: Associated with thinkers like Friedrich Ratzel and Ellsworth Huntington (Civilization and Climate, 1915), this perspective argues that physical environment—climate, topography, and natural resources—strictly determines the trajectory of human culture, social structure, and societal development.
- Possibilism: Formulated as a critique of determinism by French geographer Paul Vidal de la Blache and operationalized in anthropology by Lucien Febvre, possibilism posits that the physical environment provides a broad range of possibilities, but human agency, culture, and technology determine which paths a society adopts.
- Radhakamal Mukerjee's Ecological Sociology: A titan of Indian sociology, Mukerjee established the institutional framework for regional and ecological sociology in India. In his seminal works The Regional Balance of Man (1938) and Social Ecology (1942), he argued that human communities cannot be understood in isolation from their spatial and resource environments, bridging institutional economics, sociology, and ecology.