The moral weight tag covers posts about differences in moral status, capacity for welfare, or other factors that might determine differences in the characteristic moral value of the lives, interests, or experiences of different types of potential moral patients (such as individuals of different species).
Muehlhauser, Luke (2017) 2017 report on consciousness and moral patienthood, Open Philanthropy, June.
The idea of “moral weights” is addressed briefly in a few places.
Muehlhauser, Luke (2018) Preliminary thoughts on moral weight, LessWrong, August 14.
Schukraft, Jason (2020) Comparative moral status academic bibliography, in Michael Aird, Collection of sources relevant to the idea of “moral weight”, Effective Altruism Forum, May 8.