NATO, Now 75, Has Stabilized Europe

Tens of millions of lives protected by alliance

If NATO existed in 1914 and 1939 — if European nations, Britain, and the U.S. abided by a collective security agreement that an attack on one of them would be an attack on all of them -- World War I and World War II would not have occurred, President Harry Truman contended when he signed the North Atlantic Treaty in 1949. That would have saved between 7…