Edible or inedible A central aspect of carnism is that animals are categorized as edible, inedible, pets,
vermin, predators, or entertainment animals, according to people's
schemata – mental classifications that determine, and are determined by, our beliefs and desires. Cows are eaten in the West but revered in much of India. Pigs are rejected by Muslims and Jews but widely regarded by other groups as edible. Joy and other psychologists argue that these taxonomies determine how the animals within them are treated, influence subjective perceptions of their sentience and intelligence, and reduce or increase
empathy and moral concern for them.
Meat paradox Jeff Mannes writes that carnism is rooted in a paradox between most people's values and actions: they oppose harming animals, and yet eat them. He argues that this conflict leads to
cognitive dissonance, which people attempt to attenuate through
psychic numbing. The apparent conflict between caring about animals and embracing diets which require them to be harmed has been termed the "
meat paradox". There is experimental evidence supporting the idea that the meat paradox induces cognitive dissonance in Westerners. Westerners are more willing to eat animals which they regard as having lesser mental capacities and moral standing, and conversely, to attribute lesser mental faculties and moral standing to animals which are eaten. Furthermore, the relationship is causative: the categorization of animals as food or not affects people's perception of their mental characteristics, and the act of eating meat itself causes people to attribute diminished mental capacity to animals. Joy argues that this is why meat is rarely served with the animal's head or other intact body parts.
Justification Joy introduced the idea of the "Three Ns of Justification", writing that meat-eaters regard
meat consumption as "normal, natural, and necessary". The argument holds that people are conditioned to believe that humans evolved to eat meat, that it is expected of them, and that they need it to survive or be strong. These beliefs are said to be reinforced by various institutions, including religion, family, and the media. Although scientists have shown that humans can get enough protein in their diets without eating meat, the belief that meat is required persists. Building on Joy's work, psychologists conducted a series of studies in the United States and Australia, published in 2015, that found the great majority of meat-eaters' stated justifications for consuming meat were based on the "Four Ns" – "natural, normal, necessary, and nice". The arguments were that humans are
omnivores (
natural), that most people eat meat (
normal), that
Vegan diets are lacking in nutrients (
necessary), and that meat tastes good (
nice). Meat-eaters who endorsed these arguments more strongly reported less guilt about their dietary habits. They tended to objectify animals, have less moral concern for them and attribute less consciousness to them. They were also more supportive of
social inequality and hierarchical ideologies, and less proud of their
consumer choices.
"Saved from slaughter" narratives , in which the American president pardons a turkey, has been cited as an illustration of carnism. Animals at the center of these narratives include Wilbur in ''
Charlotte's Web (1952); the eponymous and fictional star of Babe'' (1995); Christopher Hogwood in
Sy Montgomery's
The Good, Good Pig (2006); the
Tamworth Two;
Emily the Cow and
Cincinnati Freedom. The American
National Thanksgiving Turkey Presentation is cited as another example. A 2012 study found that most media reporting on it celebrated the
poultry industry while marginalizing the link between living animals and meat. ==Non-academic reception==