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Natural law — Audiobooks
A Discourse Upon the Origin and the Foundation of the Inequality Among Mankind
by Jean-Jacques Rousseau
The Rights of War and Peace
by Hugo Grotius
The Declaration of the Rights of Man and of Citizens
by Georg Jellinek
Tradition, Principally with Reference to Mythology and the Law of Nations
by Baron John Francis Arundell Arundell of Wardour
A Discourse on the Study of the Law of Nature and Nations
by Sir James Mackintosh
Lectures on the Principles of Political Obligation
by Thomas Hill Green