 Sometimes a series of choices do not serve one’s concerns well even though each choice in the series seems perfectly well suited to serving one’s concerns. In such cases, one has a dynamic choice problem. Otherwise put, one has a problem related to the fact that one’s choices are spread out over time. There is a growing philosophical literature, which crosses over into psychology and economics, on the obstacles to effective dynamic choice. This literature examines the challenging choice situations and problematic preference structures that can prompt dynamic choice problems. It also proposes solutions to such problems. Increasingly, familiar but potentially puzzling phenomena—including, for example, self-destructive addictive behavior and dangerous environmental destruction—have been illuminated by dynamic choice theory. This suggests that the philosophical and practical significance of dynamic choice theory is quite broad.