Why did roosevelt and churchill have to meet in secret to draft the Atlantic charter?

Roosevelt and Churchill met in secret to draft the Atlantic Charter primarily to avoid alerting the Axis powers about their plans for post-war cooperation and to maintain strategic confidentiality. The meeting, held aboard a ship in the North Atlantic in August 1941, allowed them to discuss shared goals for a post-war world without drawing attention from Germany and other adversaries. Additionally, both leaders sought to solidify their alliance and present a united front, which was crucial for the morale of their nations as they faced ongoing military challenges.