According to traditional ideas, after the fall of Rome, the Dark Ages began in Europe. If we consider this name as a successful or unsuccessful metaphor, we can assume that the dark times are a fairly apt statement. The Roman Empire was not a boon for enslaved and conquered peoples, but the stability of its existence over several centuries probably became associated with bright times. Therefore, the fall of the Roman Empire was the cause of instability and the division of spheres of influence.
The pantheistic religion, which was no longer relevant, was replaced by monotheistic Christianity and Islam. The name dark times probably refers to the period of the absence of a single center of power and the many local wars that followed due to the lack of a unified system of command and military control. Equally important, the spread of Christianity and Islam took some time, and until that time, the inhabitants of the states of Europe, North Africa, and the Middle East did not have an officially approved common faith.