Frédéric Bastiat

Nature has provided, by means as simple as they are infallible, that there should be dispersion, diffusion, coordination, simultaneous progress, all constituting a state of things that your restrictive laws paralyze as much as they can; for the tendency of such laws is, by isolating communities, to render the diversity of condition much more marked, to prevent equalization, hinder integration, neutralize countervailing circumstances, and segregate nations, whether in their superiority or in their inferiority of condition.

Frédéric Bastiat, from Economic Sophisms, “To Equalize the Conditions of Production” — the “such laws” mentioned are protectionist measures, and protectionism was the chief target of Bastiat’s famous book.