Space, Defense, cinema and software?
I'd say wars have historically been a part of all nations/geographical areas more or less continuously - and empires are more inclined to participate due to 1) being bigger and 2) thinking there's more to gain from those wars (usually due to capability/likelihood of winning).
Similarly, maybe the conflicts US was involved last 30+ were the wars that broke the empire?
Personally, I'm looking forward to a world where our planet belongs to all of us and we are not limited by borders and not dying for the careers of politicians. IMHO the technology has advanced enough and the resource scarcity and most issues are artificial.
There are entire categories of things where it is just the US doing the thing, OR without the US the thing would implode.
For example, there are only two popular mobile phone operating systems: Android and iOS. Both are made by US companies (Google and Apple).
Let me put it this way: If every undersea fibre link out of the Americas was suddenly severed, people in the USA might not even notice for a while. The rest of the planet would make a winding down noise as every second piece of hardware or software stopped dead because of some missing dependency.
Not for long.
https://www.gsmarena.com/huawei_unveils_its_own_pc_os__harmo...
From my neck of the woods, we've largely viewed the Americans as part of a security arrangement (Pacific) but, as a trading partner, they are far behind the Chinese (so much so that its a constant political discussion on how to balance the two competing alliances).
This is largely what Trump was trying, and failing (miserably) to address with his tariffs, nobody buys from the US anymore.
If the fibre was cut through the USA, then yes there would be a period of difficulty, but it would be very quickly replaced with other countries technology (keeping in mind that most Western governments were looking to move to Chinese Huawei telecommunications kit until the US made aspersions as to how secure peoples data/secrets would be if that happened, completely ignoring Snowden's revelations that the US had been engaged in using the hardware in overseas telecommunications systems for that exact purpose)
Just clone the repos from GitHub, wait... oh no.
We'll just deploy it to AWS... wait... IAM is in US East 1 only. Dammit.
Okay, fine, we can live without all of those JS CDN URLs, right?
Where's NPM managed from again?
Crates.io?
NuGet?
Uh-oh.
Why don't you have a look at Asia (and it doesn't even have to be China, it can be Japan too)? Most major Asian companies have clones of the software stack that you mentioned and do not rely on it as much as you think.
These days there are (luckily) alternatives to American products, and this American-first ideology will only accelerate the speed at which the rest of the world will switch to alternative ones.
BTW Europe is already the center of the Internet at layer 3. Servers are cheaper in Europe. Bandwidth is cheaper in Europe. So I assume all those services, especially the free ones, are only hosted in the US because of latency or national pride.
Go you :\
Tbf, the rest of the world also views Europe in the same boat (if not having taken an early-bird ticket on it).