In Chapter 47 of his "India", entitled "On Vasudeva and the Wars of the Bharata," Abu Rayhan Biruni attempted to give a naturalistic explanation as to why the struggles described in the "Mahabharata" "had to take place." He explains it using natural processes that include biological ideas related to evolution, which has led several scholars to compare his ideas to Darwinism and natural selection. This is due to Biruni describing the idea of artificial selection and then applying it to nature: