For starters, you actually join the League of Nations you proposed at the end of WW1.

…Which doesn’t address the issue. How, EXACTLY, do you enforce anything without the willingness to use force? Have you seen NATO Peacekeepers? They rarely–if ever–use force, and as a result they are almost entirely ineffective at preventing shit.

Open borders, international business ties, and populations with international relations deaden the enthusiasm for interstate military conflicts in between neighboring states.

Tends to, but the accords that ended WWI required Germany to pay absolutely ruinous reparations; even with open borders, international business ties, etc., the economic depression caused by that treaty would have laid the foundation for WWII. Moreover, I note that both the US and the EU had fairly solid trade ties with Russia prior to their invasion of Crimea, and that has done pretty much fuck-all to temper Putin’s imperial ambitions.

So, again: how do you enforce ANYTHING without being willing to use force?

Arguably, the biggest deterrent to a Chinese naval invasion of Taiwan

Do you really believe that? Or is it maybe that the US always has a naval detachment close by, and has pledged to use military force to ensure that Taiwan remains free? Because China has certainly been ratcheting up their insistence that Taiwan is theirs, and that they intend to take it.