She is an Australian physician and anti-nuclear advocate.  Her various positions include;

• Founding President of the Nuclear Policy Research Institute (now Beyond Nuclear)
• President of the Helen Caldicott Foundation (2008)
• President of Physicians for Social Responsibility
• Founder of Women’s Action for Nuclear Disarmament (now Women’s Action for New Directions)
• Founding President of Standing for Truth About Radiation Foundation.

Her 13 books include;

• Nuclear Madness (1979; revised 1994)
• Missile Envy (1984)
  Nuclear Power is Not the Answer (2006)
• War in Heaven: The Arms Race in Outer Space (2007)
• Carbon-Free and Nuclear-Free: A Roadmap for US Energy Policy (2007)
• If You Love This Planet: A Plan to Save the Earth (2009)
• Crisis Without End: The Medical and Ecological Consequences of the Fukushima Nuclear Catastrophe (edited, 2014)
• Sleepwalking to Armageddon: The Threat of Nuclear Annihilation (edited, 2017)

She has appeared in numerous documentary films, received 21 honorary degrees, and been awarded many prizes.