This document discusses social mobility, which it defines as the movement of individuals or groups between social statuses or positions. It outlines several types of social mobility, including vertical (between classes or occupations), horizontal (within the same status), upward, downward, intergenerational, and intragenerational. Causes of vertical mobility include filling vacant positions, imitating lifestyles of higher strata, and changes in the social environment. Factors promoting mobility are individual attributes, occupations, religious and political institutions, family/marriage, and chance.