Two Liberalisms: Mill vs Lock

I want to suggest an idea from an observation that’s been made many times before. Namely, that what the modern center-left now likes to call “classical” and/or “social” Liberalism, is a muddle of two strains of thought in the Enlightenment, that both stand in opposition to Rousseau; but that the latter strain smuggles him back in through the kitchen door. The division in the Enlightenment between Rousseau and Hobbes is so famous it’s practically a cliché at this point.