Ramanuja is widely regarded as the founder of Vishishtadvaita Vedanta, a school of thought that emphasizes the unity and diversity of Brahman.

Visistadvaita, meaning 'qualified non-dualism', is the central concept of this school of thought, which posits that Brahman is both immanent and transcendent, and that the world is real and distinct from Brahman.

Vishishtadvaita Vedanta holds that Brahman is the immanent cause of the world, meaning that Brahman is present within the world and is the source of its existence and properties.

According to Vishishtadvaita Vedanta, the jiva is a part of Brahman, possessing a unique identity and consciousness while still being connected to the ultimate reality.

The ultimate goal in Vishishtadvaita Vedanta is moksha, which is liberation from the cycle of birth, death, and rebirth, and the attainment of a state of eternal bliss and unity with Brahman.

The Brahma Sutras, also known as the Vedanta Sutras, are considered the primary scripture for Vishishtadvaita Vedanta, providing a systematic exposition of its philosophical principles.

In Vishishtadvaita Vedanta, bhakti, or devotion to God, is considered the primary means to attain moksha, emphasizing the importance of love and surrender to the divine.

Vishnu is the primary deity worshipped in Vishishtadvaita Vedanta, representing the supreme reality and the object of devotion for spiritual seekers.

Prapatti, or surrender to God's will, is a central concept in Vishishtadvaita Vedanta, emphasizing the importance of humility, trust, and complete reliance on the divine.

Nimbarka is considered a prominent exponent of Vishishtadvaita Vedanta after Ramanuja, known for his emphasis on the concept of divine love and his interpretation of the Bhagavata Purana.

The 'sesha-seshi' relationship in Vishishtadvaita Vedanta refers to the relationship between Brahman, the supreme reality, and the jiva, the individual soul, where the jiva is dependent on and inseparable from Brahman.

The concept of 'achintya-bhedabheda' in Vishishtadvaita Vedanta refers to the simultaneous unity and distinction of Brahman and the world, emphasizing their inseparable connection while maintaining their distinct identities.

The concept of 'visesha' in Vishishtadvaita Vedanta refers to the unique characteristics of the relationship between Brahman, the jiva, and the material world, emphasizing the interconnectedness and interdependence of these entities.

The concept of 'upadhi' in Vishishtadvaita Vedanta refers to the limitations of the jiva, the individual soul, which restrict its full realization of its true nature and its relationship with Brahman.