I don't think it is very helpful to oversimplify modernism in saying that it was characterized by Liberal Capitalism. Yes some did identify and were at the roots of its movement (e.g. Locke and Smith), but where do the others stand?
I'm not arguing for a minority presence here but for giants like Rousseau and Kant who fall under modernists but fall short under other labels (ethics, politics, metaphysics and epistemology). Where else would post-modernism have had its roots?
You would have to specify that the modernism you are talking about is a classical liberal modernism and not modernism in general.
I look forward to your reply!