“So superintelligences may spend some time calculating the most likely distribution of superintelligences in foreign universes, figure out how those superintelligences would acausally “negotiate”, and then join a pact such that all superintelligences in the pact agree to replace their own values with a value set based on the average of all the superintelligences in the pact. Since joining the pact will always be better (in a purely selfish sense) than not doing so, every sane superintelligence in the multiverse should join this pact. This means that all superintelligences in the multiverse will merge into a single superintelligence devoted to maximizing all their values.”