As with most things, it is easier to focus on the failures than the successes—especially when success is measured by the bad things that never happened. The absence of tragedy does not feel as salient as its occurrence, which makes it easy to take for granted.
This is especially the case with diplomacy and global conflict resolution, which usually happens behind closed doors to allow the parties to save face. Imagine how many wars never happened because cooler heads prevailed, often with the help of nameless and faceless diplomats.
The Cuban Missile Crisis brought us to the brink of World War III, but few know, let alone appreciate, that it was the newly appointed Secretary-General of the United Nations—a soft-spoken career diplomat from Burma named U Thant—who persuaded both sides to walk back from the brink and provided a mutually acceptable resolution. American and Russian officials credited the UN, and Thant in particular, for helping deescalate the conflict; JFK remarked that “U Thant has put the world deeply in his debt.”
We see this again with UNIFIL, a multinational UN force that has been stationed at the Lebanon-Israel border since 1978 to keep the peace between the two nations. On its face, the mission has been an abject failure: skirmishes between Lebanese militias and Israeli forces continue to this day, even leading to outright war in 2006. Both sides, as well as the U.S., regard UNIFIL as worthless and often call for its mandate to end.
But an official in the Lebanese government noted that there were plenty of flare ups that had been diffused, or even prevented, through negotiations mediated by local UN forces. For all the conflicts it failed to avert—and that subsequently capture all the attention—there were just as many, if not more, that never happened because of UNIFIL intervention behind the scenes.
These are just two examples. Who knows how many more “almost-wars” and tragedies are being avoided every day, even as we speak, by thankless diplomats, negotiators, and mediators.