Among intellectuals who consider themselves 'scientific,' the phrase 'the nature of man' is apt to have the effect of a red flag on a bull.

The fact that natural-law theorists derive from the very nature of man a fixed structure of law independent of time and place, or of habit or authority or group norms, makes that law a mighty force for radical change.

The natural law is, in essence, a profoundly 'radical' ethic, for it holds the existing status quo, which might grossly violate natural law, up to the unsparing and unyielding light of reason.

Murray Rothbard Quotes