A lot. It might be a bit of a stretch to call the old monarchies "capitalist". For sure, somebody was capitalizing, mainly the aristocrats, but it has been commonly agreed, even in previous times, that capitalism requires certain features, like free trade, to even be effective.
You could attribute everything that the U.S. has ever done down to capitalism. And most of Europe past WW1 when the old monarchies fell. If you're going back to the times when a king was ruling over a country, in border-line feudal circumstances, then it's probably a stretch.