Authored by Philippe Lemieux via Mises Institute,
Liberty's history is often presented as a direct consequence of the Enlightenment: inherited authority was subjected to reason, persecution gave way to toleration, monarchy to constitutional government, and privilege to individual rights. In this account, classical liberalism leads naturally to Austrian economics and modern libertarianism. That sequence is useful but incomplete.
Liberty developed through the convergence of two lineages. The first is the modern lineage of Enlightenment criticism, which required political power to justify itself before reason. The second is an older realist tradition, running from Aristotle and Thomas Aquinas through the School of Salamanca, Richard Cantillon, Carl Menger, Eugen von Böhm-Bawerk, Ludwig von Mises, and Murray Rothbard. These thinkers did not form a single school, nor did they agree on every question. What connects them is a shared orientation: reality has an intelligible order, human action has a structure, and political power cannot be abolished either by command.
The relevant difference is not between the Enlightenment as a whole and an older tradition, nor between reason and faith. Important currents within the Enlightenment, especially the Scottish Enlightenment, recognized that custom, law, money, and markets could arise without deliberate design. The deeper conflict is between a constructivist current within modern thought and an older causal-realist approach to social order. Friedrich Hayek identified the pinnacle of this constructivism a
