 In  Section 2.2  and  Section 3  we introduced (the weak person-affecting interpretation of) the threshold conception of harm as a response to the logical-conceptual non-identity-problem. By itself this does not answer the question how this conception is to be understood as an element of a substantive understanding of distributive justice of intergenerational relations. Two debates are particularly relevant: first, the debate on how to understand the principle of distributive justice; and, second, the debate on the currency—that is, how to measure the relevant differences in well-being.