This article profiles two important leaders of the anti-nuclear weapons movement in the United States during the early 1980s. Helen Caldicott and Randall Forsberg were visionary, transformational leaders who crossed a variety of boundaries for the common good, and as such are prime exemplars of integrative leadership in action. Caldicott was a charismatic figure who used her status as physician and mother to rally a worldwide movement opposed to the ongoing proliferation of nuclear weapons and talk of "winnable" nuclear war. Forsberg was the main architect of the nuclear "Freeze" campaign whose humanitarian vision and common-sense approach to political action helped unite diverse segments of the American public around the Freeze proposal and push the Reagan administration towards disarmament talks with the Soviet Union. The article analyzes the leadership of both women in historical and social-scientific context, shedding light on two relatively unknown - yet important social movement leaders whose stories have much to tell us about integrative public leadership, the challenges faced by women leaders, and the strengths and pitfalls of charismatic leadership. (C) 2010 Elsevier Inc. All rights reserved.