I test the hypothesis proposed by Peter Singer that the philosophical case for animal liberation has been won, through a systematic review of papers published by philosophers between 1975 and 2020.

There was a slight but statistically significant correlation between support for an animal liberation vegan position, with year of publication. Support for a better treatment of animals than currently sanctioned by society increased significantly among papers discussing general principals of animal ethics.

Findings support a weaker version of Singer's hypothesis. Among the philosophical community there is greater support for animal liberation, but the debate has not been ‘won’.

Included in

Philosophy Commons