Social norm - Wikipedia
https://en.wikipedia.org/wiki/Social_normGroups may adopt norms in a variety of ways. Some stable and self-reinforcing norms may emerge spontaneously without conscious human design. Peyton Young goes as far as to say that "norms typically evolve without top-down direction... through interactions of individuals rather than by design." Norms may develop informally, emerging gradually as a result of repeated use of discretionary stimuli to control beh…
Social norms | The Good Society
thegoodsociety.gov.au › social-normsSocial norms are the unwritten rules of behaviour and belief in our social groups. Social norms influence almost all aspects of our behaviour—including consent. Norms are enforced by members of the group, through social sanctions. Social norms aren’t perfect; some social norms can be fundamentally disrespectful.