Abstract

Why should one take action to move toward a greener world if doing so will cause the birth of a totally different group of future people? This chapter starts from the metaphysical evidence that many collective climate actions imply a change in the identity of future generations, as opposed to a counterfactual laissez-faire attitude. The climatic fallout from the non-identity paradox introduced by Derek Parfit is examined to determine if and how a principle of transgenerational responsibility can be defended against this metaphysical complexity. The paradox is divided into a moral argument, based on the person-affecting view of harm, and a metaphysical premise, treating non-identity as a result of variations in timing and pair combination of a person’s conception. Three strategies to circumvent the moral argument are explored: non-consequentialist accounts of harm, moral thresholds, and impersonal ethics. However, it is argued that all three strategies fall short or come with too high a cost. The metaphysical premise is then examined through the introduction of transgenerational actions in relation to the climate crisis. A principle of transgenerational responsibility applicable to climate change mitigation is inferred from the hypothetical consent to be obtained from those who will continue transgenerational actions in the future.