"These plain people—civilians as well as soldiers and sailors and airmen—women and girls as well as men and boys—they are fighting in the front line of civilization at this moment, and they are holding that line with a fortitude that will forever be the pride and the inspiration of all free men on every continent, on every isle of the sea.
The British people and their Grecian allies need ships. From America, they will get ships.
They need planes. From America, they will get planes.
From America they need food. From America, they will get food.
They need tanks and guns and ammunition and supplies of all kinds. From America, they will get tanks and guns and ammunition and supplies of all kinds."
Franklin D. Roosevelt, Fireside Chat on the Lend-Lease Act, March 15, 1941
The policies supported in the excerpt above most directly signaled a shift away from which earlier U.S. foreign policy approach?