I think the most interesting was the combined summary of all the problems that unsound money brings with it. Most notably it's influence on major world conflicts such as WW1. While I had known about the 'warmachine' before, the correlation between government for the first time switching from the gold standard to FIAT in order to keep financing the war really opened my eyes. As Ammous describes, in the centuries before WW1 most conflicts were short and decisive, because wars were expensive because they had to be paid for in taxes by the people. These people were far less inclined to keep paying high taxes on an aggressive, nonsensical war but the introduction of the inflationary system allows for these wars to be fought and paid for by the people through a hidden measure called inflation. Without this, most likely WW1 wouldn't have lasted more than a few months at most instead of being the endless stalemate conflict that it ended up being. Not to mention the countless other wars that followed in the century after, of which few were actually backed and supported by the people.
I loved the first 100-120 pages of the book most of all. It hardly mentions Bitcoin up until that point, but it makes it painfully obvious how bitcoin is the solution.
RE: I've read The Bitcoin Standard, and so should you 👍 It's on Github for free