Original sentence: Sumner is the author of four books, including Welfare, Happiness and Ethics, the most sophisticated philosophical discussion of the nature and normative importance of welfare since James Griffin's Well-Being, and, to this date, probably the best book-length publication on the topic
Edited sentence: Sumner is the author of four books, including Welfare, Happiness and Ethics, the most sophisticated philosophical discussion of the nature and normative importance of welfare since James Griffin's Well-Being, and, to this date, the best book-length publication on the topic