In this article, the author states that, for over 45 years, she has explored the issues of leadership and change, and, along the way, she has examined how diversity fits in with these ideas. She states that she found all three of these concepts embodied in the person of John McDermott, a leader in the American Montessori movement in the United States. McDermott helped establish the framework for putting Montessori education into an American cultural context. His message was always the need for public education, the necessity of embracing African-Americans and the poor in Montessori schools, and the damage to cities caused by white flight. McDermott held to his view that the quality of public education was key to the future of the republic. He decried the economic and social disparity between poor urban and inner-city schools and those of the affluent middle class, along with the ever-widening gap between the poor and the affluent and between blacks, Latinos, and whites. McDermott continued to stress the need to make Montessori education relevant to present problems, although he did not view Montessori education as a single solution to the problems in American education. He challenged the American Montessori Society to examine the ways in which growth and change occur in America.