The phrase "in order to" is used to express a purpose or reason for doing something. It indicates that a specific action is taken to achieve a goal. For example, if someone studies hard "in order to" pass a test, it shows that the reason for studying is to achieve a good grade on that test.
The phrase "in order to" originates from Middle English "in order to," which combines "in order" (meaning arrangement or plan) and "to" (indicating direction or purpose). The term has been part of the English language for several centuries, evolving in usage to express intention.