Liberal Democracies are of, by, and for the bourgeoisie. Because Capitalists have immense influence, the state will bend to their will.
Trade is good. Capitalism is not. Capitalism is not trade, its a Mode of Production by which there are individual Capitalists and non-owner workers. We have not had Capitalism for millenia, but a few hundred years.
Capitalism did not bring us healthier, longer, and happier lives, nor reduce warfare. Development did. Capitalism drives profit, that’s it, anything else is tangential to that end.
I think you would do yourself a lot of good by reading theory.