What follows are four basic reasons that people do not eat animals. From my experience everyone falls into one or more of these categories.
Weight Loss - Over weight or obese individuals, models, actresses, military personnel, athletes.
A. This is the most common reason for changing ones diet in the modern world. Doctors who have accepted the hypothesis that cholesterol and calories are the bane of existence typically direct their patients to cut down on foods high in cholesterol and calories, which amounts to less animals and animal byproducts, such as eggs, milk and cheese.
B. These changes work for some people, however many people end up going from feast to famine. Oprah Winfrey is a good example of this.
A. Anthropologists have hypothesized what foods various extinct animals ate based on their physiognomy, particularly their jaw and dental structure. In other words, animals with dental structures similar to dogs and, or sharks; as well as short intestinal tracts are classified as “meat” eaters, while those with teeth structures similar to the elephant, cow, gorilla, etc. are identified as plant eaters.
B. The human dental structure is along the lines of these plant eaters, as is our long intestinal tract.
Humane Concerns - Animal Rights Activists, Brahmins, Krishna Devotees and Buddhists.
A. The killing of animals is cruel and inhumane therefore, we should not kill them for any reason.
B. It takes more energy to make 1lb. of beef than it does to make 1lb. of vegetables because almost all the animals we eat are plant eaters. We could save a lot of energy by eating the plants ourselves, let the animals live and be healthier all at the same time.
Religious Convictions - 7th Day Adventists, Rastas, Brahmins, Krishna Devotees and Buddhists. In the religious texts of the religions I just mentioned the eating of plants over animals is advocated.
A. Genesis 1:29 “And God said, Behold, I have given you every herb bearing seed, which is upon the face of all the earth, and every tree, in the which is the fruit of a tree yielding seed; to you it shall be for meat.” King James Version
B. The vow of the Nazarites/Rastas: Numbers 6
1 Again the LORD spoke to Moses, saying, 2 “Speak to the sons of Israel and say to them, ‘When a man or woman makes a special vow, the vow of a Nazirite, to dedicate himself to the LORD, 3 he shall abstain from wine and strong drink; he shall drink no vinegar, whether made from wine or strong drink, nor shall he drink any grape juice nor eat fresh or dried grapes. 4 ‘All the days of his separation he shall not eat anything that is produced by the grape vine, from the seeds even to the skin. 5 ‘All the days of his vow of separation no razor shall pass over his head. He shall be holy until the days are fulfilled for which he separated himself to the LORD; he shall let the locks of hair on his head grow long. 6 ‘All the days of his separation to the LORD he shall not go near to a dead person. 7 ‘He shall not make himself unclean for his father or for his mother, for his brother or for his sister, when they die, because his separation to God is on his head. 8 ‘All the days of his separation he is holy to the LORD.
King James Version
C. According to the Hindu Holy Book Manusmriti, “Meat can never be obtained without injury to living creatures, and injury to sentient beings is detrimental to (the attainment of) heavenly bliss; let him therefore shun (the use of) meat. (5:48)”