The diplomatic career of Muhammad (c. 570 - 8 June 632), the final prophet of Islam, encompasses his leadership over the growing Muslim community (Ummah) in early Arabia and his correspondences with the rulers of other nations in and around Arabia. This period was marked by the change from the customs of the period of Jahiliyyah in pre-Islamic Arabia to an early Islamic system of governance, while also setting the defining principles of Islamic jurisprudence in accordance with Sharia law and an Islamic theocracy.