Michael Allen Fox (1940)
" Animal Experimentation: A Philosopher's Changing Views https://digitalcommons.calpoly.edu/cgi/viewcontent.cgi?article=1609&context=bts" (1987), in Between the Species, vol. 3, iss. 2, p. 59.
" Speciesism https://books.google.it/books?id=Rz30CgAAQBAJ&pg=PT59" (1970). Reported in Speciesism, Painism and Happiness: A Morality for the Twenty-First Century by Richard D. Ryder (Exeter: Imprint Academic, 2011), Chapter 2.
Michael Allen Fox (1940)
" Animal Experimentation: A Philosopher's Changing Views https://digitalcommons.calpoly.edu/cgi/viewcontent.cgi?article=1609&context=bts" (1987), in Between the Species, vol. 3, iss. 2, p. 59.
Stephen Jay Gould book Leonardo's Mountain of Clams and the Diet of Worms
"Can We Truly Know Sloth and Rapacity?" pp. 389
Leonardo's Mountain of Clams and the Diet of Worms (1998)
Lyndon LaRouche (1922–2019) American political activist and founder of the LaRouche movement
"Secrets Known Only to the Inner Elites", in his political journal The Campaigner (May-June 1978), p. 64.
J. Howard Moore (1862–1916)
"The Ethics of Human Beings Toward Non-human Beings", p. 279
The Universal Kinship (1906), The Ethical Kinship
James Rachels (1941–2003) American philosopher
Created from Animals (1990), p. 131
Steve F. Sapontzis (1945)
"Saving the Rabbit from the Fox", p. 247
Morals, Reason, and Animals (1987)
Steve Stewart-Williams (1971)
Source: Darwin, God and the Meaning of Life: How Evolutionary Theory Undermines Everything You Think You Know (2010), pp. 154-155
Timothy Sprigge (1932–2007) British philosopher
Source: The Animal Welfare Movement and the Foundations of Ethics, p. 89
Jeff McMahan (philosopher) (1954) American philosopher
" The Meat Eaters http://opinionator.blogs.nytimes.com/2010/09/19/the-meat-eaters/", The New York Times, 19 Sept. 2010