If we have some UDT-incompatible selfish preferences, that’s fine with me—so most likely this is so different from Rawls that it’s not even a fix to selfishness.
But yeah, the peace and harmony model is quite Rawlsian, and is somewhat equivalent to the claim that if we want to self-modify, we should also act as if we self-modified in the past. (Where there is some vagueness in how to cash out ‘past self’, which probably makes the UDT formulation nicer).
How is this different from the Rawlsian fix to selfishness?
If we have some UDT-incompatible selfish preferences, that’s fine with me—so most likely this is so different from Rawls that it’s not even a fix to selfishness.
But yeah, the peace and harmony model is quite Rawlsian, and is somewhat equivalent to the claim that if we want to self-modify, we should also act as if we self-modified in the past. (Where there is some vagueness in how to cash out ‘past self’, which probably makes the UDT formulation nicer).