David O. McKay’s missionary experiences, apostolic assignments, and prophetic initiatives helped transform the Latter-day Saint faith into a global religion. Known for his warmth, charisma, and attentiveness to people, McKay combined personal ministry with a visionary approach to leadership. He traveled the world as an Apostle to meet members, assess local needs, and expand missionary work. As the prophet, President McKay also created new missions, adapted racial policies in response to local conditions, and established the first temples outside the United States and Canada. In this interview, biographer Brian Q. Cannon traces the lasting impact of David O. McKay on the international Church.