Friedrich A. Hayek argues that “equality of the general rules of law and conduct” is the only kind of equality compatible with liberty and, moreover, that attempting to pursue equality along any other dimension is likely to destroy liberty. For Hayek, then, as a social philosopher and political economist who was principally concerned with understanding and promoting liberal order, the question “What kind of equality?” has a straightforward answer. Equality before the law, perhaps equality of opportunity in a procedural sense, is the equality that we should pursue, not material equality and certainly not equality of outcomes. One wonders, though, whether Hayek dismisses too quickly the more substantive forms of equality and, more importantly, whether we can achieve the liberal society that Hayek envisions without concerning ourselves with more than just the presence or absence of equality of the general rules of law and conduct. This essay will explore, criticize, and expand upon the way that Hayek makes use of equality in his conception of a free society. Specifically, we argue that Hayek may need a more substantive conception of equality than he is willing to deploy in order to arrive at the liberal society he hopes to bring about.