From Liberty and Property — surrounding passage

As far as individuals have the opportunity to choose, they are free; if they are forced by violence or threat of violence to surrender to the terms of an exchange, no matter how they feel about it, they lack freedom. This slave is unfree precisely because the master assigns him his tasks and determines what he has to receive if he fulfills it. As regards the social apparatus of repression and coercion, the government, there cannot be any question of freedom.

“Government is essentially the negation of liberty.”

It is the recourse to violence or threat of violence in order to make all people obey the orders of the government, whether they like it or not. As far as the government’s jurisdiction extends, there is coercion, not freedom. Government is a necessary institution, the means to make the social system of cooperation work smoothly without being disturbed by violent acts on the part of gangsters whether of domestic or of foreign origin.