The term "leadership development" is often used in the field of education, management, and business, yet in the context of the leadership learning framework (LLF), it takes on a specific meaning as the innermost, human facets of leadership learning. In addition to the current scholarship around leadership development as a key component of leadership learning, this article will explore "leadership" development's evolution--from its interconnection with "leader" development, the use of training and education to foster it, to its growth self-awareness within group dynamics. This evolution will be considered in the contexts of both education and organizations. Finally, questions and recommendations for future scholarship in leadership are posed for both researchers and practitioners.