47 Kultura i Wartości ISSN 2299-7806 Nr 28 (2019) http://dx.doi.org/10.17951/kw.2019.28.47-64 Metaethical grounds for changing the understanding of values in Peter Singer’s ethics (in the context of his reflection on the value of human life) Jakub Synowiec 1 https://orcid.org/0000-0002-6357-6344 Following an analysis of Peter Singer’s works the article reviews metaethical grounds for possible change of perception regarding social values. The author asserts that Singer applies the principle of equal consideration of interests as a tool to assess proposed changes in societal values. The novel point made in this paper is the observation that some changes in perceiving the values of human life and their implications arising from applying the principle of equal con- sideration of interests in ethical reflection conducted by the philosopher on the critical level of moral reasoning, cannot be promoted as principles on the intuitive level due to the application of the principle of equal consideration of interests on the metaethical level. Keywords: Peter Singer, metaethics, value of life, principle of equal consideration of in- terests Peter Singer is a deeply revisionist moral philosopher. He openly claims that his philosophy is aimed at changes in the realm of values and at rethinking specific views and attitudes that seem obvious to the contemporary man. Throughout his JAKUB SYNOWIEC, PhD, Faculty of Philosophy, The Pontifical University of John Paul II in Cracow; address for correspondence: ul. Kanonicza 9/203, 31-002 Kraków, Poland; e-mail: jakub.syn- owiec@upjp2.edu.pl Pobrane z czasopisma http://kulturaiwartosci.journals.umcs.pl Data: 26/06/2020 21:06:43