What makes a moral choice valid? In AGENCY, Paul Pence approaches morality from first principles, setting aside political, religious, and cultural assumptions to examine the fundamental requirements that make moral choice possible. Rather than asking which moral system is correct, AGENCY asks a deeper question: What must exist before any moral system can function at all? Drawing on philosophy, psychology, systems thinking, and everyday experience, the book explores the relationship between self, uncertainty, and consequence; the conditions required for meaningful choice; personal responsibility; moral accountability; and the obligations we have to preserve the capacity for moral choice in ourselves and others. From these foundations emerges a framework for evaluating moral systems not by tradition or popularity, but by how effectively they protect and enhance the ability of individuals to make valid moral choices. Written for thoughtful readers rather than academic specialists, AGENCY combines accessible explanations with rigorous analysis, challenging readers to examine not merely what they believe is right, but how they determine right from wrong in the first place. The first volume of the HUMANITY trilogy, AGENCY lays the foundation for a broader exploration of morality, meaning, legacy, and human purpose.