The Book of Mormon reveals the fact that there existed two great civilizations on the American continent. The first was established by a colony which left the valley of the Euphrates in very ancient times, established themselves in the North American continent, and in time grew to be a great nation far advanced in civilization. This race passed through all the vicissitudes incident to national existence; periods of prosperity, times of disaster; periods of great righteousness, when prophets with their divine message influenced the people to keep the commandments of God, followed by long periods of moral and spiritual depression, and ultimately succumbed to the fate which overtakes all nations that depart from truth and righteousness. The second civilization resulted from two colonies which came from Judea; one led by Lehi, landing in South America; the other colony was led by Mulek, who escaped from Palestine after the overthrow of Jerusalem by the Babylonians. This colony landed in North America. These colonies subsequently united and formed one great nation. This nation, like others, followed the beaten track of the history of other nations.