This book examines both academic and practical theories relating to leader development. It broadens the scope of this topic by including data-driven theory and proposals from diverse areas that are either not currently represented or are poorly addressed in existing literature.This 15th volume in the Annals of Theoretical Psychology series aims to propose, identify, and characterize new theoretical, educational, and practical gaps in leader development. The initial chapters explore concepts related to individual or internal aspects of leaders.Subsequent chapters deconstruct leader development by considering behaviors or skills and various environmental factors that affect development. The book also examines shortcomings of our current understanding of this topic that cuts across multiple disciplines. Topics featured in this book include:Cognition, readiness to lead, courage through dialogue, and relationship considerations Behavioral elements and approaches for developing followership,