 Nozick describes the task of identifying the compensation due to A for undergoing B’s chosen action as the task of identifying the just division of the benefits generated by B’s action. B gains through his action; but justice requires that he share those gains with A—especially since the immediate effect of B’s action is a loss for A. The just division of the benefits is the division that A and B would settle upon in conjunction with A’s agreement to be subject to the action in question. And the best procedure for identifying what terms would be settled upon is to require antecedent negotiation and consent—when antecedent negotiation and consent is feasible.