Hume

 Hume’s moral philosophy is found primarily in Book 3 of The Treatise of Human Nature and his Enquiry Concerning the Principles of Morals, although further context and explanation of certain concepts discussed in those works can also be found in his Essays Moral, Political, and Literary. This article discusses each of the topics outlined above, with special attention given to the arguments he develops in the Treatise.

https://iep.utm.edu/humemora/