Sociology emerged in the 19th century driven by industrialization and social change. It is influenced by enlightenment, french revolution and industrial revolution, sociology solidified through movements like positivism, socialism and functionalism.Key figures include Auguste comte, Karl marx, Emile durkheim, Herbert spencer and Max weber.

Intellectual influences – 

1. Enlightenment thinkers like Rousseau, Voltaire and Kant promoted reason, science and critical inquiry in sociology.
2. Philosophers like Hegel, Comte and Spencer influenced sociology with ideas on morality, society and human nature.
3. Classical liberals like Adam Smith and John Stuart Mill shaped sociology with ideas on individualism.

Socio and Economic changes – 

1. Industrial Revolution brought urbanization, industrialization and capitalism transforming social structures and economic relationships drastically.
2. French Revolution (1789) sparked social upheaval challenging traditional authority and promoting equality, liberty and democratic ideals.
3. Rise of capitalism created new social classes, economic inequalities and consumer culture reshaping social relationships and institutions.

Scientific and Methodological advances – 

1. Positivism led by Auguste comte emphasized empirical observation, scientific method and quantitative data in sociology research.
2. Statistics and demography enabled sociologists to analyze population trends, patterns and correlations quantifying social phenomena objectively.
3. Evolutionary theory inspired by Charles Darwin influenced sociologists to study social change, progress and adaptation.

These historical antecedents converged to establish sociology as a distinct discipline focused on understanding social relationships, institutions and change. The first sociology departments emerged in the late 19th century with the University of Chicago (1892) and the London School of Economics (1895) among the pioneers.