DescriptionA-theories of time postulate a fundamental distinction between the present and other times. This distinction manifests in what A-theorists take to exist, their accounts of property change, and their views about the appropriate temporal logic. In this dissertation, I argue for a particular formulation of the A-theory that dispenses with change in existence and makes tense operators an optional formal tool for expressing the key theses. I call my view the minimal A-theory. The first chapter introduces the debate. The second chapter offers an extended, logic-based argument against more traditional A-theories. The third and fourth chapters develop my alternative proposal. The final chapter considers a problem for A-theorists who think the contents of our attitudes reflect changes in the world.