Advaita philosophy of Vedanta philosophy is highly essential to understanding Indian philosophy. As a matter of fact, talks about one of the most influential schools of Sanatan Darshana Vedanta. Upanishad monism, Shaktyadvaism, the monism of Shaivagam, Buddhist monism, Bhartrihari-propounded word dualism, Gaudapadiya monism, Mayavadapush Shankara monism, Ramanuja's Vishishtadvaita, non-Vallabhacharya's philosophy of non-duality, non-Vallabhacharya's all doctrines of non-duality and non-Vallabhacharya. Acharyas have also rendered the philosophical doctrine of monistic ideology with the logical validity of their opinion. But in all these monistic theories, the completely theoretical, systematic, and harmonious rendition of monism which is found under Shankara's Advaita, is available in the above-mentioned other theories in a lesser form. That is why when  is discussed in general, it is meant with the Advaita philosophy of Shankaracharya's philosophy.