I happen to agree with the clause you quote because I think the divergence of a single person is so great as to swamp 6 billion people. I imagine that if one could contain that divergence, one would hardly worry about the problem of different people.
Today, people tend to spend more time and worry about the threat that other people pose than the threat that they themselves (in another mood, perhaps) pose.
This might weakly indicate that inter-person divergence is bigger than intra-person.
Looking from another angle, what internal conflicts are going to be persistent and serious within a person? It seems to me that I don’t have massive trouble reconciling different moral intuitions, compared to the size and persistence of, say, the Israel-Palestine conflict, which is an inter-person conflict.
Today, people tend to spend more time and worry about the threat that other people pose than the threat that they themselves (in another mood, perhaps) pose.
This might weakly indicate that inter-person divergence is bigger than intra-person.
Looking from another angle, what internal conflicts are going to be persistent and serious within a person? It seems to me that I don’t have massive trouble reconciling different moral intuitions, compared to the size and persistence of, say, the Israel-Palestine conflict, which is an inter-person conflict.