was a single voting unit. Everything in the system tended to put real power into the hands of the executive. When you get the executive able to control policy you get efficiency, but if you want liberty you must adopt other means. The senate at Rome gradually came to consist entirely of retired magistrates, and so to exhibit all the knowledge, competence, experience, and bigoted self-confidence which we expect from retired functionaries. The republican constitution had invented two devices to save itself from tyranny, and, according to tradition, had invented them at the very beginning of republicanism. One was the collegial system by which every magistracy was held in commission by two or more colleagues. There were two consuls from the first, sharing between them most of the royal prerogatives, heads of the executive in peace and supreme generals in war, with power of life and death, or full _imperium_, at any rate on the field of battle. There was at first only one prætor, for he was then merely the consuls’ lieutenant in time of war; but when, as soon happened, the prætor became a judge in time of peace, that office, too, was given to a pair of colleagues. There were, it is said, at first two tribunes of the plebs, principally charged with the protection and leadership of their own order; but as the city grew their numbers were increased to ten. So there were two ædiles, who principally looked after affairs of police in the city. There were two censors, ranking highest of all in the hierarchy of office because their sphere was so largely connected with religion. Their duty was to number the people and to expiate that insult to heaven with a solemn rite of purification. In numbering they also had to assess every man’s property for the purpose of fixing his rank in the army and in the state. All these magistrates had powers of jurisdiction in various spheres. All the priests and prophets, too, of whom there were many varieties, were formed into colleges. Only the _pontifex maximus_ stood alone without a colleague--and he had an official wife. We are too familiar with the working of “boards” and “commissions” to misunderstand the purpose of this system. Theory required unanimity in each board, each member of it had power to stop action by the others, one powerful weapon to that end being the religious system whereby nothing could be attempted without favourable omens. You had only to announce unpropitious auspices to stop any action whatever.