Culture refers to the beliefs, values, behaviors and objects that form a society's way of life. It has two main components - nonmaterial culture like ideas and material culture like technology. Culture influences personality development and consists of ideals and real-world behaviors. Key parts of culture found across societies are symbols, language, values and norms. Language allows cultural transmission between generations while values and norms guide behavior. A society's culture can include subcultures and be judged through ethnocentrism or cultural relativity. There is debate around whether a global culture is emerging due to economic, communication and migration trends.