People of different nations have over time, evolved certain ethics in the practice of hospitality. Cultures and subcultures vary in the extent to which people show hospitality to strangers as opposed to friends or members of one's in-group. For instance, in India, hospitality is, based on the principle, Atithi Devo Bhava, meaning: "the guest is god." From this stems the Indian approach of graciousness towards guests at home, and in all social situations.