I saw it as a different discussion because the "what is a person's duty?" is a different question than "does a person have a duty?".
But you might be right, the evolution of morals that we've seen in the last 75 years might have killed the concept of Duty as a byproduct - because we no longer accept the same things as our Duty, nothing replaced them and the whole concept died.
But you might be right, the evolution of morals that we've seen in the last 75 years might have killed the concept of Duty as a byproduct - because we no longer accept the same things as our Duty, nothing replaced them and the whole concept died.