We think less than we think. My thesis moves from this suspicion to show that standard accounts of intentional action can't explain the whole of agency. Causalist accounts such as Davidson's and Bratman's, according to which an action can be intentional only if it is caused by a particular mental state of the agent, don't work for every kind of action. So-called automatic actions, effortless performances over which the agent doesn't deliberate, and to which she doesn't need to pay attention, constitute exceptions to the causalist framework, or so I argue in this thesis. Not all actions are the result of a mental struggle, painful hesitation, or the weighting of evidence. Through practice, many performances become second nature. Thin...