Vegetarianism isn't new like many thing, it has roots in India and ancient Greece.
Really? Did they do it for ethical or health reasons back then?
History of vegetarianism
The earliest records of vegetarianism as a concept and practice amongst a significant number of people are from ancient India and the ancient Greek civilizations in southern Italy and Greece. In both instances, the diet was closely connected with the idea of nonviolence toward animals (called "ahimsa" in India), and was promoted by religious groups and philosophers.
Following the Christianization of the Roman Empire in late antiquity (4th–6th centuries), vegetarianism nearly disappeared from Europe. Several orders of monks in medieval Europe restricted or
hydrocarbons, present in processed, smoked and cooked foods, are known to be carcinogenic.
Meat in society.
Meat is part of the human diet in most cultures, where it often has symbolic meaning and important social functions. Many people, however, choose not to eat meat (this is referred to as vegetarianism) or any food made from animals (veganism). The reasons for not eating all or some meat may include ethical objections to killing animals for food, health concerns, environmental concerns or religious dietary