It's from FDR's 1941 State of the Union address, better known as the Four Freedoms speech. The speech criticizes all the isolationist bozos in Congress, argues for more aid to Britain (planes and tanks and guns and shit), and lays out four "essential human freedoms" as justification for war, before we were even officially in the war. Really shrewd marketing.
FDR delivered the speech on January 6, 1941, which was almost a full year before the attack on Pearl Harbor. Isolationist sentiment had been strong throughout the 1930s, but was on its way out. Congress passed the nation's first peacetime draft in September 1940, shortly before FDR won reelection for a third term. (Wendell Willkie, the Republican nominee, was also an interventionist, which probably helped.) Then, Lend-Lease was passed a few months later in March 1941.
I highly recommend giving the entire speech a read or a listen sometime. It's a great speech, and is somewhat relevant at the moment, given current events.
P.S. Norman Rockwell painted four paintings based on the speech. They're pretty well-known. They were used in a bunch of wartime propaganda. You might recognize some of them.
P.P.S. No End Save Victory is evidently also the title of a book about -- you guessed it -- America's move from isolationism during World War II. I haven't read it, but the cover looks great.
P.P.P.S. If you read this far, I owe you a beer and five minutes of your life back.