According to the Roman Catholic perspective, the church and the state each have their own government and are autonomous in their own spheres.
Constantine improved the status of Christianity during the fourth century, making it acceptable and supported. The State started becoming engaged in church-related issues. For instance, Emperors convened councils to try and resolve the church's doctrinal unity. Only Christianity was practiced in the new imperial capital of Constantinople; traditional rituals from other religions were not permitted. It appears that Constantine and his sons wanted to unify the empire through the church. The majority of Roman emperors following Constantine's dynasty were conservative Christians, but mostly as a way to maintain their hold on the empire.
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The discovery of petroleum/oil most likely greatly affected the economies of many middle eastern countries.
The groups of native people incorrectly labeled “Indians” by Columbus were actually a diverse mix of different tribes which spanned the islands of the Greater and Lesser Antilles. The people Columbus encountered are known as the Tainos. The different groups that lived in the Bahamas at the time of his arrival were the Eastern, Western, and Classic Tainos; the Island-Caribs; and a small group called the Guanahatabeys. According to most recent findings, the natives were spread out among the large and small islands of the Caribbean, with the Tainos dominating the landscape. I do not own any of this material but I hope it helps you.