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 most fascinating of intellectual problems; it is rich in sophisticated and stimulating discussions of a variety of metaphysical issues.