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. In that constitution, the grossest delusions of superstition were supported in such a manner by the private interests of so great a number of people, as put them out of all danger from any assault of human reason; because, though human reason might, perhaps, have been able to unveil, even to the eyes of the common people, some of the delusions of superstition, it could never have dissolved the ties of private interest. Had this constitution been attacked by no other enemies but the feeble efforts of human reason, it must have endured for ever. But that immense and well-built fabric, which all the wisdom and virtue of man could never have shaken, much less have overturned, was, by the natural course of things, first weakened, and afterwards in part destroyed; and is now likely, in the course of a few centuries more, perhaps, to crumble into ruins altogether.
The gradual improvements of arts, manufactures, and commerce, the same causes which destroyed the power of the great barons, destroyed, in the same manner, through the greater part of Europe, the whole