This chapter distinguishes a notion of separability of lives from a stronger notion of separability of people, which takes into account the possibility of a person’s nonexistence. It defends separability of lives on the basis of the principle of personal good. It thereby opens up the people route to aggregation when the population of the world is constant. It assesses the principle of personal good, particularly considering its relation to the value of equality and its conflict with discounting for time.
Keywords: separability of lives, separability of times, discounting, equality, same-number aggregation