The historical evidence in favor of "free minds and free markets," is there for everyone to see.
Marian Tupy writes:
Considering that Homo sapiens only emerged as a unique species of hominids some 200,000 years ago, our experience with prosperity is incredibly short, amounting to no more than 0.1 percent of our time on Earth. The remarkable novelty of our present abundance may, perhaps, explain our unease with it ("all good things must come to an end") and our eschatological obsessions ranging from overpopulation to out-of-control global warming.
Continued human progress does, of course, depend on maintaining policies, institutions and ideas (intellectual enlightenment, classical liberalism and free exchange) that made it possible in the first place.