Immanuel Kant

The civil state regarded purely as a lawful state, is based on the following a priori principles: 

• The freedom of every member of society as a human being.
• The equality of each with all the others as a subject.
• The independence of each member of a commonwealth as a citizen.

These principles are not so much laws given by an already established state, as laws by which a state can alone be established in accordance with pure rational principles of external human right. 

Immanuel Kant, Theory and Practice (1791).