Social cohesion is widely understood as a desirable feature of social formations and usually implies stability, solidarity, social integration, and some form of togetherness. The concept is used to characterize entities of various sorts, from small groups to local communities to nation-state societies. A family can be cohesive, a neighborhood, an organization, or a religious community can be, but we usually would not speak of cohesion as of a person. Etymologically, this is reflected in the concept’s roots in chemistry, where it describes forces of attraction that bind similar molecules to one another, as in a drop of water. In the social world, cohesion is widely deemed desirable because it implies low levels of intractable conflict, high levels of cooperation and integration, and strong communal and emotional bonds.