The right theory of individual freedom came from an understanding of the spontaneous evolution of civil institutions and traditions. A free society no more needed an intelligent designer than did the human species.  

The similarity of process in the development of social and biological life is brilliantly explained by one of the great defenders of freedom:

Though freedom is not a state of nature but an artifact of civilization, it did not arise from design. …

[The] development of a theory of liberty took place mainly in the eighteenth century. It began in two countries, England and Fance. The first of these knew liberty, the second did not. As a result, we have had to the present day two different traditions in the theory of liberty … the first based on an interpretation of traditions and institutions which had spontaneously grown up … the second aiming at the construction of a utopia, which has often been tried but never successfully. …

What we have called the “British tradition” was made explicit mainly by a group of Scottish moral philosophers led by David Hume, Adam Smith and Adam Ferguson, seconded by their English contemporaries Josiah Tucker, Edmund Burke, and William Paley … drawing largely on a tradition rooted in the jurisprudence of the common law. Opposed to them was the tradition of the French Enlightenment … : the Encyclopedists and Rousseau, the Physiocrats and Condorcet, are their best known representatives. …

[T]here is hardly a greater contrast imaginable between their respective conceptions of the evolution and functioning of a social order and the role played in it by liberty. …

[T]he British philosophers laid the foundations of a profound and essentially valid theory, while the [French] school was simply and completely wrong. …

Those British philosophers have given us an interpretation of of the growth of civilization that is still the indispensable foundation of the argument for liberty. They find the origin of institutions, not in contrivance or design, but in the survival of the successful. …

This demonstration … represented in some ways an even greater challenge to all design theories than even the later theory of biological evolution. For the first time it was shown that that an evident order which was not the product of a designing human intelligence need not therefore be ascribed to the design of a higher, supernatural intelligence, but that there was a third possibility – the emergence of order as the result of adaptive evolution.

-From The Constitution of Liberty by F. A. Hayek , Chapter Four: Freedom, Reason, and Tradition.