When the balance between good and evil tilts in favor of evil, Vishnu appears upon the earth as one of the ten Vishnu avatars or dashavatar to restore balance. The first four avatars (Matsya, Kurma, Varaha and Narasimha) of God Vishnu appeared in Satya or Krita Yuga. The next three (Vamana, Parasurama and Sri Rama) appeared in Treta Yuga, the eighth (Sri Balarama) and ninth (Sri Krishna) in Dwapara Yuga and the tenth (Kalki Avatar) will appear at the end of Kali Yuga.
