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Austin's theory of law:    • Hart - Concept of Law - Ch 2 (Summary...  
Hart's theory of law:    • Hart - Concept of Law - Ch 5 (Primary...   and    • Hart - Concept of Law - Ch 6 (The Rul...  

This is a video lecture that explains the central theory, for the last two centuries, in the philosophy of law: legal positivism. I created this additional lecture because I found that the standard readings on the positivism v natural law theory debate (often as exemplified by figures like HLA Hart, Ronald Dworkin, John Finnis, and Joseph Raz) were not enough to get my students to latch on to exactly what legal positivism is.