system
A chat on subreddit /r/wallstreetbets
human
It's a great comparison (US vs EU). Also, in terms of trade, imagine that California (UK) starts customs on Texas (Germany) products and services, and vice versa. That's what's about to happen here in the EU.

gpt
German GDP 3.7 trillion at least, U.K. 2.6 and going down soon : ) U.K. is on par with California, but Germany has 2 trillion over Texas.