Liberty is essential to order to leave room for the unforeseeable and unpredictable

The Constitution of Liberty by F.A. Hayek

The case for individual freedom rests chiefly on the recognition of the inevitable ignorance of all of us concerning a great many of the factors on which the achievement of our ends and welfare depends.… Liberty is essential to order to leave room for the unforeseeable and unpredictable; we want it because we have learned to expect from it the opportunity of realizing our many aims. It is because every individual knows so little and, in particular, because we rarely know which of us knows best that we trust the independent and competitive efforts of many to induce the emergence of what we shall want when we see it.

In order to evolve in an environment of unknowable changes in external condition, all systems have to have some minimum level of variation on which selection can occur.

Liberty is variation is evolution is survival.