Where do the reasons for classifying certain items elements or categories come from

Few elements of language expose a cultural worldview better than idioms. In fact, understanding culture and language is achievable in fast forward just by learning idioms. So as you learn a language, make yourself available to understanding culture and the worldview that comes along with it.Where do the reasons for classifying certain items, elements or categories of information originally come from? Executive Order 13526 What do derivative classifiers use to identify specific items or elements of information to be protected?