— Sir Adrian Cadbury, director of the Bank of England, chairman of Cadbury-Schweppes, Chancellor of Aston University, chairman of the Committee on Financial Aspects of Corporate Governance in the UK (The "Cadbury Report"), and author of The Company Chairman
"John Carver, like Robert K. Greenleaf before him, is a revolutionary of the very best kind. Carver's Policy Governance model has provided the means for trustees to live out Greenleaf's challenge to boards to act as both servant and leader. In so doing, John has proven himself to be one of our greatest servant-leaders."
— Larry Spears, CEO, The Greenleaf Center for Servant-Leadership, editor of Reflections on Leadership and Insights on Leadership
"The conceptual clarity of Dr. Carver's approach provided us an excellent basis for development of new governance arrangements in defence, helping us to sharpen our focus on results and the associated accountability framework."
— Dr. Allan Hawke, Secretary, Australian Department of Defence, Canberra