Research, study and application of knowledge about different cultures, their differences and similarities. On the one hand, it includes a theoretical and academic approach (see e.g. "Developmental Model of Intercultural Sensitivity" by Milton Bennett, Dimensions of Culture by Geert Hofstede). On the other hand, it comprises practical applications such as learning to negotiate with people from different cultures, living with people from different cultures, living in a different culture and the prospect of peace between different cultures.