Book excerpt: A major voice in late twentieth-century philosophy, Alan Donagan is distinguished for his theories on the history of philosophy and the nature of morality. The Philosophical Papers of Alan Donagan, volumes 1 and 2, collect 28 of Donagan's most important and best-known essays on historical understanding and ethics from 1957 to 1991. Volume 1 includes essays on Spinoza, Descartes, Bradley, Collingwood, Russell, Moore, and Popper, as well as two previously unpublished papers on the history of philosophy as a discipline, and on Ryle and Wittgenstein's nature of philosophy. Linked by Donagan's commitment to the central importance of history for philosophy and his interest in problems of historical understanding, these essays represent the remarkable scope of Donagan's thought.