Step 1: Understanding Vishishtadvaita philosophy.
Vishishtadvaita is a major school of Vedanta philosophy in Hinduism. The word Vishishtadvaita means “qualified non-dualism”. It explains that Brahman (the ultimate reality) is one but possesses attributes and qualities. The individual souls and the universe are real and exist as parts of Brahman.
Step 2: Contribution of Ramanujacharya.
The philosophy of Vishishtadvaita was systematized and propagated by
Ramanujacharya, a great Indian philosopher and theologian of the 11th–12th century. He emphasized devotion (Bhakti) to Lord Vishnu and taught that the soul and the universe are dependent on Brahman.
Step 3: Comparison with other philosophers.
- (A) Madhwacharya: He propounded the Dvaita (dualism) philosophy which states that the soul and God are completely different.
- (B) Shankaracharya: He propounded Advaita (non-dualism), which states that Brahman alone is real and the world is an illusion.
- (C) Basaveshwara: He was a social reformer and founder of the Lingayat movement, not related to Vishishtadvaita.
- (D) Ramanujacharya: Correct. He established the Vishishtadvaita school of Vedanta.
Step 4: Conclusion.
Therefore, the philosopher who propounded the Vishishtadvaita philosophy is Ramanujacharya.
Final Answer: Ramanujacharya.