Vegetarianism is strongly linked with a number of religions that originated in ancient India (Jainism, Hinduism and Buddhism). In Jainism, vegetarianism is mandatory for everyone; in Hinduism and Mahayana Buddhism, it is advocated by some influential scriptures and religious authorities. Comparatively, in the Abrahamic religions (Judaism, Christianity, and Islam), the Bahá'í Faith and Dharmic religions such as Sikhism, vegetarianism is not promoted by mainstream authorities, although in all these faiths there are small groups actively promoting vegetarianism on religious grounds.
Most Indian religions have philosophical schools that forbid consumption of meat and Jainism institutes an outright ban on the same. Consequently, India is home to more vegetarians than any other country. About 30% of India's 1.2 billion population practices lacto vegetarianism, with overall meat consumption increasing. The per capita meat consumption in India in 2002 was 5.2 kg, while it was 24 times more in the United States at 124.8 kg. Meat consumption in the United States and India grew at about 40% over the last 50 years. In 1961 Indian per capita meat consumption was 3.7 kg, while the US consumption was 89.2 kg.
Vegetarianism in Jainism is based on the principle of nonviolence (ahimsa, literally "non-injuring"). Vegetarianism is considered mandatory for everyone. Jains are either lacto-vegetarians or vegans. No use or consumption of products obtained from dead animals is allowed. Moreover, Jains try to avoid unnecessary injury to plants and suksma jiva (Sanskrit for subtle life forms; minuscule organisms). The goal is to cause as little violence to living things as possible, hence they avoid eating roots, tubers such as Potatoes, garlic and anything that involves uprooting (and thus eventually killing) a plant to obtain food.