It is sometimes said that we exhibit an asymmetry in our attitudes to future nonexistence and past non-existence: we lament that we will not exist after we die, but we do not lament that we did not exist before we were created. This asymmetry is seen as puzzling. One of those who made this claim was Lucretius: Lucretius’s Puzzle: Why is it that we lament our non-existence after death, but...