Ah, you’ve mistaken capitalism (which had been developing for centuries earlier) with 18th century liberal economic theory, which is not its foundation but instead a rough ex-post-facto rationalization for large parts of the way it had developed.
What capitalism is, though, is the systematic prioritization of the interests of the mercantile (which became, as legal property rights coalesced around their interest, capitalist) class as the organizing principle of society.
