Population_And_Demographic_Study encompasses academic disciplines that examine human populations through quantitative and qualitative analysis of demographic processes, life course dynamics, and population structures. This interdisciplinary domain integrates statistical analysis with social theory to understand how populations change over time and space, examining fundamental demographic processes and their social implications. The field employs sophisticated methodological approaches to analyse population data, demographic transitions, and cohort effects across different societies and historical periods. These disciplines contribute essential knowledge for understanding societal transformations, resource allocation challenges, and the social consequences of demographic shifts. They provide critical insights into how population structures influence social institutions, economic systems, and policy development. The domain bridges quantitative demographic analysis with sociological understanding of how population changes affect social organisation, intergenerational relationships, and societal adaptation. This knowledge base is increasingly vital for addressing contemporary challenges related to population aging, demographic transitions, and the social implications of changing population structures in both developed and developing societies.