sentences:  Such experiences can affect not only an individual but can also be collectively experienced by an entire group of people.Tragic experiences can collectively wound or threaten the national identity, that sense of belonging shared by a nation as a whole represented by tradition culture, language, and politics.In individual psychological trauma, fundamental assumptions about how the individual relates to the world, such as that the world is benevolent and meaningful and that the individual has worth in the world, are overturned by overwhelming life experiences.