
Source: The Point of View of the Universe: Sidgwick and Contemporary Ethics (2017), p. 343
Source: Animal Liberation: A New Ethics for our Treatment of Animals (1975), Ch. 1: All Animals Are Equal
Source: The Point of View of the Universe: Sidgwick and Contemporary Ethics (2017), p. 343
Axelrod, Robert, and William Donald Hamilton. "The evolution of cooperation." Science 211.4489 (1981): 1390
"The Ethics of Human Beings Toward Non-human Beings", p. 279
The Universal Kinship (1906), The Ethical Kinship
Speech to the Electors of Bristol (3 November 1774); as published in The Works of the Right Hon. Edmund Burke (1834)
1770s
Peter Singer - The Genius of Darwin: The Uncut Interviews - Richard Dawkins https://www.youtube.com/watch?v=GYYNY2oKVWU, 2009.
Source: Practical Ethics
Context: Speciesism is an attitude of prejudice towards beings because they're not members of our species, so just as racism means that you're prejudiced against beings who are not members of your race and sexism means you're prejudiced against people of the other sex. So we humans tend to be speciesist in we think that any being that is a member of the species homo sapien just automatically has a higher moral status and is more important than any being that is a member of any other species, irrespective of the actual characteristics of those beings.
1950s, The Russell-Einstein Manifesto (1955)
" Speciesism Again: The Original Leaflet http://www.veganzetta.org/wp-content/uploads/2013/02/Speciesism-Again-the-original-leaflet-Richard-Ryder.pdf", in Critical Society, Issue 2, Spring 2010.