Jacy Reese Anthis (/ˈdʒeɪsi ˈriːs/ JAY-see REESS; born December 16, 1992)[1] is an American social scientist, writer and co-founder of the Sentience Institute with Kelly Witwicki.

[5] Before finishing his undergraduate degree, Anthis worked on the Animal Charity Evaluators (ACE) Board of Directors; he joined them as a full-time researcher after graduation.

[6] ACE is an organization within the effective altruism movement that evaluates and compares various animal charities based on their cost-effectiveness and transparency, particularly those that are tackling factory farming.

[9][10][11] After a year and a half at Animal Charity Evaluators, Anthis briefly worked with Sentience Politics, a project of the Effective Altruism Foundation.

[6][12] In The End of Animal Farming, Anthis "outlines an evidence-based roadmap to a humane, ethical, efficient food system where slaughterhouses are obsolete".