<Li> Roles are occupied by individuals, who are called "actors"; </Li> <Li> When individuals approve of a social role (i.e., they consider the role "legitimate" and "constructive"), they will incur costs to conform to role norms, and will also incur costs to punish those who violate role norms; </Li> <Li> Changed conditions can render a social role outdated or illegitimate, in which case social pressures are likely to lead to role change; </Li> <Li> The anticipation of rewards and punishments, as well as the satisfaction of behaving in a prosocial way, account for why agents conform to role requirements . </Li>

Who has given structural theory of role conflict