"Constrained" is in the spirit of Adam Smith, Burke and Hayek (all of whom would be aghast at being labeled "conservative"); "unconstrained" is in the spirit of

"Constrained" is in the spirit of Adam Smith, Burke and Hayek (all of whom would be aghast at being labeled "conservative"); "unconstrained" is in the spirit of Rousseau, and in particular his claim that "man is born free, but everywhere he is in chains." The Constrained vision assumes that the best we can do is choose a set of trade-offs that are least bad; the Unconstrained vision assumes that trade-offs are illusions imposed by defective institutions, and so if we improved/reformed/abolished the institutions, we could eliminate the trade-offs. There's a lot more to it, so you should read the book, but that's the basic thesis.