Assault on the Rule of Law
In The Constitution of Liberty Friedrich Hayek warned that the rule of law could evolve into the rule of despotism unless the rules that are enforced by the state are known, certain, and prospective rather than retrospective. Throughout history, a hallmark of governmental tyranny has been the opposite kind of behavior: random arrests and incarceration for breaking "laws" that the alleged lawbreakers had no way of knowing about; constantly shifting definitions of what is legal and what is not; and sudden announcements that behavior which was thought for years to be legal and proper was illegal.