Wahhabism is a conservative Islamic movement founded by Muhammad ibn Abd al-Wahhab in the 18th century, advocating for a return to the earliest fundamental sources of Islam, the Quran and Hadith, and rejecting later interpretations and practices it views as innovations. It has significantly influenced the religious and political landscape of Saudi Arabia, where it is the dominant form of Islam, and has been a source of controversy and debate within the Muslim world and beyond due to its strict interpretations and influence on global Islamic movements.