Perry was Bill Clinton’s Defence Secretary and has worked on security throughout his career. He explains the development of his thinking on weaponry and security as he journeys from the Cuban Missile Crisis to crafting a defence strategy in the Carter Administration to offset the Soviets’ numeric superiority in conventional forces, presiding over the dismantling of more than 8,000 nuclear weapons in the Clinton Administration, and his creation in 2007 (with George Shultz, Sam Nunn and Henry Kissinger) of the Nuclear Security Project to articulate “a vision of a world free from nuclear weapons and to lay out the urgent steps needed to reduce nuclear dangers”.