There are dozens of leadership theories, types, and styles. Among them is "principled leadership," the demands for which have become increasingly vocal, if not desperate, as ethical crises plague more and more organizations and individuals. But while there is strong consensus surrounding the need for principled leadership, there is little common understanding of it as an art and science. What exactly is principled leadership? How does it work? How does a leader practice it? What distinguishes it from other leadership types? What does it look like in action? How is principled leadership more than just individual principled behavior? Unless these questions can be answered with rigor, detail, and specificity, "principled leadership" is just another siren call that produces limited practical value. On the other hand, if they can be answered, then principled leaders can be systematically developed, and they can deliberately practice principled leadership and achieve its positive and powerful effects. This book introduces principled leadership theory and offers practical case studies.