p.s. If the foundational math of distributional justice interests you, I suggest this as a starting point for further reading. I took an undergrad course with S. J. Brams, one of the authors, a long time ago. Truthfully I hated it. Brams is not a great lecturer, and he seemed to be teaching to the pace of the median undergraduate, which bored me sometimes literally to unconsciousness. On the other hand, it's one of the few undergrad courses whose content I have a nontrivial memory of, and I still have this book on my shelf, so in retrospect maybe it was a good course.