A social group consists of interactions between social agents structured around certain norms, interests, and values. Social groups vary in size from families to governments and sports teams. They are characterized by a number of individuals with reciprocal relations, common goals, a sense of unity and solidarity, group norms, and similar behaviors while being aware of group control. Social groups can be permanent or temporary and are dynamic entities that respond to changes while maintaining established patterns, with examples being primary, secondary, in and out, reference, voluntary and involuntary, large and small, and patterned and non-patterned groups.