Bangladesh, March 7 -- French President Emmanuel Macron has delivered what could become one of the most consequential speeches on European security since the end of the Cold War. In a major policy address outlining the future of Europes defense posture, Macron announced sweeping changes to Frances long-standing nuclear doctrine and unveiled a new framework designed to extend nuclear cooperation with key European allies. The speech signals a profound shift in Europes strategic thinking as the continent confronts mounting geopolitical pressures, the long shadow of the war in Ukraine, and uncertainty over the future trajectory of American security commitments.

At the center of Macrons message was a blunt observation about power and deterren...