Very good overview and means of comparing Hume/Leibniz/Kant/Hegel's moral philosophies. Rawls' own interjections and criticisms were always appreciated; in fact, I wish he had done more editorializing. I came to this book after months of feeling like I had become "more Kantian" in my own moral philosophy; I wanted to read Rawls to better understand Kant's doctrine, and, theoretically, come to appreciate it even more. Curiously, despite Rawls own Kantian affinities, I found his presentation of Hume and Hegel more compelling than what he said about Kant, or at least relative to my previous inclinations. The sophistication of Hume's moral psychology, and his thoroughgoing naturalism, is hard to argue with -- though Rawls' points about the existence of substantial reason-based deliberation even within Hume's own terms are strong. Hegel's conceptions of freedom as realized in social/civic institutions, his attention to historical circumstances and virtue as something realizable only within a specific context, and his top-down perspective on the morality of the state are all positions I find compelling. I still find much of Kantian social contract theory and universalizable reason compelling, but much of Rawls' presentation made me realize how idealistic and empty Kant's conception of the moral law is (same for Kingdom of Ends and many related notions), and that his lack of attention to context/history really is problematic. Not to mention the Kant material felt drier than anything else. Maybe that is due to the complexity of Kant's ideas, and I likely didn't appreciate the nuance of many of his positions, but maybe it is because there is something stiff and empty about Kantian ethics compared to others. I want to continue engaging with this tradition of ideas and related debates, but this was likely enough for a while. It can feel so disconnected from any real moral or political concerns.