Hinduism refers to a religious mainstream which evolved organically and spread over a large territory marked by significant ethnic and cultural diversity. This mainstream evolved both by innovation from within, and by assimilation of external traditions or cults into the Hindu fold. The result is an enormous variety of religious traditions, ranging from innumerable small, unsophisticated cults to major religious movements with millions of adherents spread over the entire subcontinent. The identification of Hinduism as an independent religion separate from Buddhism or Jainism consequently hinges on the affirmation of its adherents that it is such.