1. Gautama Buddha (circa 563-483 BCE):

    • Philosophy: Buddhism
    • Key Ideas: Buddha founded Buddhism and taught the Four Noble Truths, which address the nature of suffering, its origin, cessation, and the path to its cessation. He also emphasized the concept of impermanence, the middle way, and the Eightfold Path as a guide to ethical and mental development.
  2. Adi Shankaracharya (788-820 CE):

    • Philosophy: Advaita Vedanta
    • Key Ideas: Shankaracharya was a proponent of non-dualism (Advaita) and argued that the ultimate reality (Brahman) is devoid of distinctions. He believed that individual souls (Atman) are ultimately identical to Brahman and that realizing this unity leads to liberation (moksha).
  3. Ramanuja (1017-1137 CE):

    • Philosophy: Vishishtadvaita Vedanta
    • Key Ideas: Ramanuja advocated for qualified non-dualism, emphasizing the eternal relationship between the individual soul (Atman) and the supreme reality (Brahman). He believed that the individual soul maintains its identity while being eternally related to God.
  4. Chanakya (c. 350-275 BCE):

    • Philosophy: Arthashastra
    • Key Ideas: Chanakya was an ancient economist, political strategist, and philosopher. He is known for his treatise "Arthashastra," which discusses statecraft, economics, and political ethics. His ideas on governance and statecraft have had a lasting impact in India.
  5. Swami Vivekananda (1863-1902):

    • Philosophy: Vedanta and Modern Hindu Philosophy
    • Key Ideas: Vivekananda played a key role in introducing Vedanta and Hindu philosophy to the West. He emphasized the universality of religious experience and promoted the idea of the divinity of the individual soul. He also stressed the importance of service to humanity.
  6. Aurobindo Ghose (1872-1950):

    • Philosophy: Integral Yoga and Integral Philosophy
    • Key Ideas: Aurobindo developed the philosophy of Integral Yoga, which integrates spiritual and physical aspects of life. He believed in the evolution of human consciousness and advocated for the realization of the divine within.
  7. Sarvepalli Radhakrishnan (1888-1975):

    • Philosophy: Comparative Religion and Indian Philosophy
    • Key Ideas: Radhakrishnan was a philosopher and statesman who played a pivotal role in promoting Indian philosophy on the global stage. He emphasized the importance of understanding and appreciating the diversity of religious and philosophical traditions.
  8. Jiddu Krishnamurti (1895-1986):

    • Philosophy: Spiritual Inquiry and Self-Knowledge
    • Key Ideas: Krishnamurti emphasized the need for self-inquiry and direct experience to understand the nature of the self and the mind. He rejected religious dogma and advocated for a free and unburdened approach to spiritual exploration.
  9. Aryabhata (476-550 CE):

    • Philosophy: Mathematics and Astronomy
    • Key Ideas: Aryabhata was an ancient Indian mathematician and astronomer known for his contributions to the fields of mathematics and astronomy. He formulated mathematical and astronomical theories, including the concept of zero, which had a profound influence on mathematics worldwide.
  10. Dnyaneshwar (1275-1296 CE):

    • Philosophy: Bhakti and Mystical Poetry
    • Key Ideas: Dnyaneshwar was a Marathi saint and poet-saint known for his devotional and mystical poetry, particularly his commentary on the Bhagavad Gita, called "Dnyaneshwari." His works emphasize the path of devotion and union with the divine.
  11. Chaitanya Mahaprabhu (1486-1534):

    • Philosophy: Gaudiya Vaishnavism
    • Key Ideas: Chaitanya Mahaprabhu was a proponent of the Gaudiya Vaishnavism tradition and emphasized the practice of bhakti (devotion) to Lord Krishna. He popularized the congregational chanting of the Hare Krishna mantra as a means to attain spiritual realization.
  12. Vallabha Acharya (1479-1531):

    • Philosophy: Shuddhadvaita Vedanta
    • Key Ideas: Vallabha Acharya founded the Shuddhadvaita school of Vedanta, emphasizing the purity of devotion to Lord Krishna. He believed that the individual soul's relationship with God is a central theme in spirituality and that pure love and devotion lead to liberation.
  13. B.R. Ambedkar (1891-1956):

    • Philosophy: Social Justice and Buddhism
    • Key Ideas: Ambedkar was a prominent social reformer, jurist, and the chief architect of the Indian Constitution. He dedicated his life to advocating for the rights of the lower castes in India and played a significant role in the Dalit Buddhist movement, promoting Buddhism as a path to social and spiritual liberation for oppressed communities.
  14. Radha Mohan Lohia (1910-1967):

    • Philosophy: Socialism and Political Thought
    • Key Ideas: Lohia was a social and political thinker who contributed to socialist and political philosophy. He advocated for socio-economic equality and played a role in Indian politics through his ideas on grassroots democracy and decentralized governance.
  15. K.C. Bhattacharya (1875-1949):

    • Philosophy: Neo-Hegelianism and Metaphysics
    • Key Ideas: Bhattacharya was an Indian philosopher known for his work in metaphysics and for introducing Hegelian philosophy to India. He explored themes related to reality, consciousness, and the nature of the self.