Rank-Additive Population Axiology

46 Pages Posted: 30 Aug 2018

See all articles by Marcus Pivato

Marcus Pivato

THEMA, CY Cergy Paris Université

Date Written: August 15, 2018


The class of "rank-additive" (RA) axiologies includes rank-weighted utilitarian, generalized utilitarian, and rank-discounted generalized utilitarian rules; it is a flexible framework for population ethics. This paper axiomatically characterizes RA axiologies and studies their properties in two frameworks: the "actualist" framework (which only tracks the utilities of people who actually exist), and the "possibilist" framework (which also assigns zero utilities to people who don’t exist). The axiomatizations and properties are quite different in the two frameworks. For example, actualist RA axiologies can simultaneously evade the Repugnant Conclusion and promote equality, whereas in the possibilist framework, there is a tradeoff between these two desiderata. On the other hand, possibilist RA axiologies satisfy the Positive Expansion and Negative Expansion axioms, whereas the actualist ones don’t.

Keywords: Population ethics; Repugnant Conclusion; additively separable; rank-dependent; utilitarian.

JEL Classification: D63, D71

Suggested Citation

Pivato, Marcus, Rank-Additive Population Axiology (August 15, 2018). Available at SSRN: https://ssrn.com/abstract=3231904 or http://dx.doi.org/10.2139/ssrn.3231904

Marcus Pivato (Contact Author)

THEMA, CY Cergy Paris Université ( email )

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