Presidential government is one of the two kinds of government classified by the relationship between their legislative and executive agencies. The written constitution that provides for the separation of powers between branches is the specific trait gives the United States a presidential system of government.
"The Senate of the Roman Republic was a political institution in the ancient Roman Republic. It was not an elected body, but one whose members were appointed by the consuls, and later by the censors. After a Roman magistrate served his term in office, it usually was followed with automatic appointment to the Senate." -Wikipedia
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Civil-Political, Socio-economic, Collective Developmental
The crisis of the Roman Catholic Church was the rise of the Protestants. The movement initiated by these people is called "Reformation" which was led by Martin Luther and was continued by John Calvin and others. The movement aims to "reform the Catholic Church, mainly its religious forms." This became a threat to the absolute power of the Church.
