The essays in this volume tell part of the story about Reid's significance in his time and ours. They represent three broad themes in his philosophy: mind, knowledge, and value. The essays present Reid's philosophy of developing agents in a rich world of objects and values - agents with intellectual and active powers whose regularity is productive. Though such agents are equipped at first with rudimentary abilities, those abilities are responsive. Our powers consist in a fundamental and ongoing engagement with a world that calls on us to be flexible, sensitive, astute, and, ultimately, practical.