In the state in which things were, through the greater part of Europe, during the tenth, eleventh, twelfth, and thirteenth centuries, and for some time both before and after that period, the constitution of the church of Rome may be considered as the most formidable combination that ever was formed against the authority and security of civil government, as well as against the liberty, reason, and happiness of mankind, which can flourish only where civil government is able to protect them.