Vegetarianism isn't linked intrinsically with any religion, it
could be anything
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It's probably the oldest diet as vegetable based foods are
easier to acquire than are animal based foods....the world's oldest
religion, Hinduism advocates vegetarianism.
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Buddhism helped promote vegetarianism--the practice of ahimsa, or nonviolence.
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Animals are affected by vegetarianism as well as the environment
and the people who partake in vegetarianism.