Our interactions with the 98% of the world's population world that isn't American are on all levels... economic, legal, etc..
Only in a twisted world is the SOS primarily a military crisis manager. That's a world we are hopefully moving past.
With all the talk about SOS lately, I asked myself which modern SOS had the biggest historical footprint. It's gotta be George Marshall, right? And despite being a great man of war he is remembered today almost entirely for his work with our allies, not our enemies.
history will associate Marshall foremost as the author of the Marshall Plan. The idea of extending billions of American dollars for European economic recovery was not his alone. He was only one of many Western leaders who realized the tragic consequences of doing nothing for those war-shattered countries in which basic living conditions were deplorable and still deteriorating two years after the end of the fighting. But Marshall, more than anyone else, led the way. In an address at Harvard University on June 5, 1947, Marshall, in his capacity as secretary of state, articulated the general principles of the Marshall Plan. Between 1948 and 1951, the United States contributed more than thirteen billion dollars of economic, agricultural, and technical assistance toward the recovery of free Europe. The Marshall Plan was generally acclaimed a success in its day and has admirably withstood the rigors of historical inquiry. Moreover, it gave impetus to the formation of the North Atlantic Treaty Organization and to the European Common Market. In recognition of Marshall's world leadership, he was awarded the Nobel Peace Prize in 1953.
http://www.npg.si.edu/exh/marshall/marsh2.htm