violate the principle of equality by favouring the interests of their own sex. Similarly, speciesists allow the interests of their own species to override the greater interests of members of other species. The pattern is identical in each case. Singer stated from a preference-utilitarian perspective, writing that speciesism violates the principle of equal consideration of interests, the idea based on Jeremy Bentham's principle: "each to count for one, and none for more than one." Singer stated that, although there may be differences between humans and nonhumans, they share the capacity to suffer, and we must give equal consideration to that suffering. Any position that allows similar cases to be treated in a dissimilar fashion fails to qualify as an acceptable moral theory. The term caught on; Singer wrote that it was an awkward word but that he could not think of a better one. It became an entry in the Oxford English Dictionary in 1985, defined as "discrimination against or exploitation of animal species by human beings, based on an assumption of mankind's superiority." In 1994 the Oxford Dictionary of Philosophy offered a wider definition: "By analogy with racism and sexism, the improper stance of refusing respect to the lives, dignity, or needs of animals of other than the human species." Anti-speciesism movement The French-language journal Cahiers antispécistes ("Antispeciesist notebooks") was founded in 1991, by David Olivier, Yves Bonnardel and Françoise Blanchon, who were the first French activists to speak out against speciesism. The aim of the journal was to disseminate anti-speciesist ideas in France and to encourage debate on the topic of animal ethics, specifically on the difference between animal liberation and ecology. Estela Díaz and Oscar Horta assert that in Spanish-speaking countries, unlike English-speaking countries, anti-speciesism has become the dominant approach for animal advocacy. In Italy, two distinct trends have been identified in the contemporary anti-speciesist movement, the first focusing on radical counter-hegemonic positions and the second on mainstream neoliberal ones. More recently, animal rights groups such as the Farm Animal Rights Movement and People for the Ethical Treatment of Animals have attempted to popularize the concept by promoting a World Day Against Speciesism on June 5. The World Day for the End of Speciesism (WoDES) is a similar annual observance held at the end of August. The WoDES has been held annually since 2015. Social psychology and relationship with other prejudices Some psychologists have argued there is