After the close of Constantine's reign very great evils threatened the Roman administration. First of these was the barbarians; second, the populace; and third, the soldiers. The barbarians continually made inroads upon the territory, broke down the governmental system, and established their own, not so much for the sake of destruction and plunder, as is usually supposed, but to seek the betterment of their condition as immigrants into a new territory. That they were in some instances detrimental to the Roman institutions is true, but in others they gave new life to the declining empire. The populace was a rude, clamorous mass of people, seeking to satisfy their hunger in the easiest possible way. These were fed by the politicians for the sake of their influence. The soldiery of Rome had changed. Formerly made up of patriots who marched out to defend their own country or to conquer surrounding provinces in the name of the Eternal City, the ranks were filled with mercenary soldiers taken from the barbarians, who had little interest in the perpetuation of the Roman institutions. They had finally obtained so much power that they set up an emperor, or dethroned him, at their will. And finally it may be said that of all these internal maladies and external dangers, the decline in moral worth of the Roman nation is the most appalling. Influenced by a broken-down philosophy, degenerated in morals, corrupt in family and social life, the whole system decayed, and could not withstand the shock of external influence. _Summary of Roman Civilization_.--The Roman contribution, then, to civilization is largely embraced in the development of a system of government with forms and functions which have been perpetuated to this day; the development of a system of law which has found its place in all modern legal {267} codes; a beautiful and rich language and literature; a few elements of art and architecture; the development of agriculture on a systematic basis; the tendency to unify separate races in one national life; the practice of the art of war on a humane basis, and the development of the municipal system of government which has had its influence on every town of modern life. These are among the chief contributions of the Roman system to the progress of humanity.