Michael Tooley presents a major new philosophical theory of the nature of time. He argues for a dynamic conception of the universe, according to which past, present, and future are not merely subjective features of experience: past and present are real, while the future is not. The key to understanding the nature of time is to understand the relation between time and causation. Time, Tense, and Causation is a landmark treatment of one of the oldest and mostfascinating of intellectual problems; it provides sophisticated and stimulating discussions of a wide range of metaphysical issues.'Tooley's provocative book makes an extremely valuable contribution to the literature on the philosophy of time and is mandatory reading for anyone working in the area.' L. Nathan Oaklander, Mind.