text: Shiva Purana Alain Daniélou states that Asuras were initially good, virtuous and powerful in Indian mythology. However, their nature gradually changed and they came to represent evil, vice and abuse of power. In Shiva Purana, they evolved into anti-gods and had to be destroyed because they threatened the gods.
  The asuras (anti-gods) were depicted to have become proud, vain, to have stopped performing sacrifices, to violate sacred laws, not visit holy places, not cleanse themselves from sin, to be envious of devas, torturous of living beings, creating confusion in everything and challenging the devas.
  Alain Daniélou states that the concept of asuras evolved with changing socio-political dynamics in ancient India. Asuras gradually assimilated the demons, spirits, and ghosts worshipped by the enemies of Vedic people, and this created the myths of the malevolent asuras and the rakshasa. The allusions to the disastrous wars between the asuras and the suras, found in the Puranas and the epics, may be the conflict faced by people and migrants into ancient India.
  Context
  Scholars have disagreed on the nature and evolution of the Asura concept in ancient Indian literature. The most widely studied scholarly views on Asura concept are those of FBJ Kuiper, W Norman Brown, Haug, von Bradke, Otto, Benveniste, Konow, Rajwade, Dandekar, Darmesteter, Bhandarkar and Raja, Banerji-Sastri, Padmanabhayya, Skoeld, SC Roy, kumaraswamy, Shamasastry, Przyluski, Schroeder, Burrows, Hillebrandt, Taraporewala, Lommel, Fausboll, Segerstedt, Thieme, Gerschevitch, Boyce, Macdonnell, Hermann Oldenberg, Geldner, Venkatesvaran, and Jan Gonda.