Social integration refers to the principles by which individuals or actors are related to one another in a society. It also refers to a process of largely agreeing on a shared system of meaning, language, culture, and the like. Social integration, together with economic integration and identity integration are three main dimensions of a newcomers experience in the society that is receiving them. A higher extent of social integration contributes to a closer social distance between groups and more consistent values and practices.
The major source of social integration which sociologists have identified in advanced capitalist societies is the class system. In feudal society, the system of estates played an equivalent role, as did caste in Indian society. In general, status-based societies are likely to lead to harmonious forms of social integration, and class societies to conflictful forms of social integration.