Jainism is an ancient Indian religion that emerged in the 6th century BCE, founded by Rishabhanatha (the first Tirthankara) and propagated by Mahavira (the 24th Tirthankara). It is a non-theistic religion that emphasizes self-effort to achieve spiritual liberation. Its core principles are deeply ethical and have had a profound impact on Indian society.

Basic Tenets of Jainism:

1. Ahimsa (Non-violence): This is the most fundamental and central principle of Jainism, extending to all living beings – humans, animals, plants, and even microscopic organisms. Jains practice extreme care to avoid causing harm through thought, word, or deed. This principle influences their diet (strict vegetarianism/veganism), occupations (avoiding those that involve harm), and daily conduct.
2. Anekantavada (Multi-faceted Reality): The doctrine of non-absolutism, which posits that reality is complex and has multiple facets. No single viewpoint can capture the whole truth; truth is relative to the perspective from which it is seen. This promotes intellectual tolerance, open-mindedness, and a rejection of dogmatism.
3. Syadvada (Conditional Predication): A logical extension of Anekantavada, it suggests that all statements are true only in some respect, context, or condition. It uses the prefix "Syat" (meaning "in some respect" or "perhaps") before any statement to indicate its conditional nature, acknowledging the partiality of human knowledge.
4. Aparigraha (Non-possessiveness/Non-attachment): This principle advocates for the renunciation of worldly possessions and desires. Jains believe that attachment to material things leads to suffering and hinders spiritual progress. Monks and nuns practice extreme non-possessiveness, while lay followers are encouraged to limit their possessions and live simply.
5. Satya (Truthfulness): Speaking the truth, but always with the caveat of Ahimsa. Truth should not be spoken if it causes harm to others.
6. Asteya (Non-stealing): Not taking anything that is not given, including thoughts, words, or deeds. It extends to not taking advantage of others.
7. Brahmacharya (Chastity/Celibacy): For ascetics, it means complete celibacy. For lay followers, it implies fidelity to one's spouse and control over sensual desires.
8. Karma: Jains believe in a complex system of karma, where every action (physical, verbal, mental) creates karmic particles that attach to the soul, determining future existences. Liberation (Moksha) is achieved by shedding accumulated karma and preventing new karma from attaching through ascetic practices and ethical living.

Impact on Indian Society:

1. Emphasis on Ahimsa and Vegetarianism: Jainism significantly influenced the concept of non-violence in Indian thought, contributing to the widespread adoption of vegetarianism and the general ethos of compassion towards animals. Mahatma Gandhi's philosophy of non-violence was deeply rooted in this ancient Indian tradition, including Jainism.
2. Economic Impact: Due to the strictures against occupations involving violence (e.g., agriculture, warfare), many Jains historically gravitated towards trade, commerce, and moneylending. This led to the community becoming economically prosperous and influential, particularly in certain regions like Gujarat, Rajasthan, and Karnataka.
3. Art and Architecture: Jains have made significant contributions to Indian art and architecture. Their elaborate temples (e.g., Dilwara Temples at Mount Abu, Ranakpur Jain Temple) and colossal sculptures (e.g., Gomateshwara statue at Shravanabelagola) are renowned for their intricate craftsmanship and beauty.
4. Literature and Education: Jain monks and scholars played a crucial role in preserving and contributing to Indian literature, particularly in Prakrit, Apabhramsha, Kannada, and Gujarati languages. They established libraries (bhandaras) and educational centers, fostering learning and scholarship.
5. Social Reform: Jainism, by rejecting the caste system and advocating for the equality of all souls, offered an alternative to the rigid social hierarchy prevalent in ancient India. While it didn't completely dismantle the caste system, its principles promoted a more egalitarian outlook and challenged Brahmanical dominance.
6. Ethical Framework: The Jain ethical framework, with its emphasis on self-control, honesty, non-possessiveness, and ecological awareness, has provided a strong moral compass for its followers and influenced broader Indian ethical discourse.
7. Environmental Ethics: The deep respect for all forms of life inherent in Ahimsa has modern resonance with environmental ethics and sustainable living, advocating for a harmonious relationship with nature.

In summary, Jainism, through its profound philosophical tenets, particularly Ahimsa, has left an indelible mark on Indian society, influencing its ethical values, dietary practices, economic patterns, artistic expressions, and intellectual traditions, contributing significantly to India's diverse cultural heritage.