Vegetarian Diet
The reasons that can lead to dispense animal food are many. Some ancient religions such as Hinduism and Buddhism, rejecting animal sacrifice, believing in the transmigration of souls.
Christianity sets along fast days of the year in which you can not eat meat. Seventh Day Adventists advocate vegetarianism, while Judaism and Islam prohibit, among other foods, beef and pork.
The most extreme and strict vegetarian diets is the Zen, especially the one followed in their monasteries, and that is reduced to a bowl of rice a day.
A mid-century, vegetarianism became a stream of Western fashion and since then has not ceased to be a very popular diet. Some would continue to eat healthily, others to protest the treatment given to farm animals, and some that say that eating only vegetables contribute to environmental conservation.