Koldo
Outstanding Member
Kant's "Kritik der reinen Vernunft" and "Kritik der praktischen Vernunft" (there must be translations somewhere if you don't read German) build a very strong case why morals should be categorical (equal for everybody).
Oh, Kantian ethics!
Why would you bring it up on this topic? It holds no practical value nowadays. Essentially no one lives by the categorical imperative. What would be the point on lecturing me on that?