Intellectual history refers to the historiography of ideas and thinkers. This history cannot be considered without the knowledge of the men and women who created, discussed, wrote about, and in other ways were concerned with ideas. Intellectual history as practiced by historians is parallel to the history of philosophy as done by philosophers, and is more akin to the history of ideas. Its central premise is that ideas do not develop in isolation from the people who create and use them, and that one must study ideas not as abstract propositions but in terms of the culture, lives, and historical contexts that produced them.