In Hinduism, the history of mankind is described in four religious (dharmic) ages (yugas), which depict a gradual decline in religious activities, only to be renewed at the end to start a new cycle of the four ages. At the end of Kali Yuga, the current and last age in a cycle, Kalki, the 10th avatar of Vishnu, is prophesied to appear to punish the wicked, reward the good, and inaugurate Satya Yuga of the next cycle. Kalki is the last avatar in the current cycle.