Values, norms, and beliefs make up the key components of culture. Values are principles of right and wrong that guide beliefs even without evidence, and can contradict between ideal and real cultures. Norms are unwritten guidelines for appropriate behavior in specific situations, and can be prescriptive, proscriptive, formal or informal. Norms are enforced through social sanctions from agents of social control, and violations are judged based on how seriously the culture takes the norm, from folkways to mores to laws to taboos.