Active — read in full 2026-10-29 (NOTE-1279), in place of LIT-1760, which could not be reached; worth reading as a conceptual extension of the 2012 mortality-and-legacy result to group cooperation, and as the record's nearest substitute for Wade-Benzoni et al. 2012 (LIT-1760). Read it knowing that its legacy induction bundles three mechanisms, one of them identification with past and future generations, so it cannot say which did the work.