This book is about U Thant, the longest serving Secretary General of the UN of all time. He was also the first non-white holder of the position (in a time when we were a lot more openly racist), which also caused issues.
The book is all rather depressing. Thant, quite rightly, had no problem sticking his nose into situations he thought were important to the UN. This meant that in the 10+years he was in charge, he stuck his nose in the Cuban Missile Crisis, the Congolese Civil War (yes that’s be going on since the 1960s -the former colonial powers were meddling to get raw materials out cheaply), the Vietnam War, the Indian war with Pakistan, and the Six Day War in the Middle East.
The West was happy with Thant initially, because he helped negotiate a way out of the Cuban Missile Crisis, but once he started expressing opinions about conflicts where they might be viewed as the aggressor, or went against their interests, they had no problem slagging him off, ruining his reputation, preventing him from winning the Nobel Peace Prize (in all likelihood stopping him from getting it in 1965 to 1967 -Thant was told he’d won, only to be told later he hadn’t, after the chair had a hissy fit), and being racist, and/or condescending to him by acting like he couldn’t see issues like they could.
The result was that the organisation was damaged, in my opinion. At a time when a large number of former colonies were stepping onto the world stage, they were being destabilised by the former colonial powers, and attacked the most significant person who called them on it.
So all in all, a depressing book.