This document provides an overview of social stratification. It defines social stratification as the division of society into ranked groups based on factors like wealth, income, power and occupation. The document discusses the origins of stratification in hunting and gathering societies and its evolution in agricultural societies. It examines the causes of stratification such as inequality, conflict and power dynamics. Different forms of stratification are outlined including slavery, caste systems and class-based systems. The impacts of stratification on access to healthcare, education and social roles are also summarized.