The worship of Yahweh alone began at the earliest with Elijah in the 9th century BCE, but more likely with the prophet Hosea in the 8th; even then it remained the concern of a small party before gaining ascendancy in the Babylonian exile and early post-exilic period. The early supporters of this faction are widely regarded as being monolatrists rather than true monotheists; they did not believe Yahweh was the only god in existence, but instead believed he was the only god the people of Israel should worship. Finally, in the national crisis of the exile, the followers of Yahweh went a step further and outright denied that the other deities aside from Yahweh even existed, thus marking the transition from monolatrism to true monotheism.