This is arguably the seminal work in historical and philosophical analysis of the twentieth century. Originally delivered for the William James lecture series at Harvard University in 1932-33, it remains the cornerstone of the history of ideas. Lovejoy sees philosophy's history as one of confusion of ideas, a prime example of which is the idea of a "great chain of being"--a universe linked in theology, science and values by pre-determined stages in all phases of life.

Lovejoy's view is one of dualities in nature and society, with both error and truth as part of the natural order of...