As someone in the Left Foreign Policy Space or, less charitably, the "professional managed imperial decline" business, I think it's important to be crystal clear about the harms currently built in and what risks look like when building something different, even as unstable hegemony cannot hold.
It's the global leviathan problem: we know and see clearly the harms stemming from accumulated force and a world built around it, and also, the immediate lose of that superstructure is not the absence of violence but different violence, a different sorting of outcomes. Foolish to mess it up but alas