As early as the Treta Yug, asurs have tried to disrupt creation. Disruption of creation is inevitable. Mahapralay is a natural follow-through of creation and asurs have an important role to play in it. Without the asurs, mahapralay cannot happen, and a new beginning cannot be made. Everything in creation is cyclical, nothing is linear. There is childbirth, death and rebirth. The sun rises and sets to rise again. A seed gives rise to a tree, which produces more seeds for more trees. Moon follows a cycle, as does water. The cyclical pattern is seen in human evolution, too. Lighter thoughts, thoughts for creation and selfless actions make one rise, and heavier thoughts, asuric disposition put one on the descending cycle. There is a limit to how much you can rise or fall, and that depends on the influence asurs and devas have in your life. Ravan, for instance, ascended to be one of the greatest pandits of all times who extemporaneously created the Shiv Tandav Stotram, to perfect w...