The benefits conferred upon the world by the, universal dominion of Rome were of quite inestimable value. First of these benefits, and (as it were) the material basis of the others, was the prolonged peace that was enforced throughout large portions of the world where chronic warfare had hitherto prevailed. The _pax romana_ has perhaps been sometimes depicted in exaggerated colours; but as compared with all that had preceded, and with all that followed, down to the beginning of the nineteenth century, it deserved the encomiums it has received. The second benefit was the mingling and mutual destruction of the primitive tribal and municipal religions, thus clearing the way for Christianity,--a step which, regarded from a purely political point of view, was of immense importance for the further consolidation of society in Europe. The third benefit was the development of the Roman law into a great body of legal precepts and principles leavened throughout with ethical principles of universal applicability, and the gradual substitution of this Roman law for the innumerable local usages of ancient communities. Thus arose the idea of a common Christendom, of a brotherhood of peoples associated both by common beliefs regarding the unseen world and by common principles of action in the daily affairs of life. The common ethical and traditional basis thus established for the future development of the great nationalities of Europe is the most fundamental characteristic distinguishing modern from ancient history.