From Mises Wiki, the global repository of classical-liberal thought
Liberty is the freedom of individuals from outside compulsion or coercion. Acts of aggression diminish or destroy the liberty of the victims. Classical liberalism popularized the view that liberty should be maximized by minimizing the role of the state in human affairs. The concept of liberty became so popular that antiliberal factions began claiming to support liberty. Liberals meanwhile began exploring more radical views than the minarchism of their forbears. Beginning with the era of Murray Rothbard, Austrian school thinkers have generally endorsed completely abolishing the state, viewing it as causing more aggression than it prevents.