But though this exclusion is essential to the Presidential system of government, it is not for that reason a small evil. It causes the degradation of public life. Unless a member of the legislature be sure of something more than speech, unless he is incited by the hope of action, and chastened by the chance of responsibility, a first-rate man will not care to take the place, and will not do much if he does take it. To belong to a debating society adhering to an executive (and this is no inapt description of a congress under a Presidential Constitution) is not an object to stir a noble ambition, and is a position to encourage idleness. The members of a Parliament excluded from office can never be comparable, much less equal, to those of a Parliament not excluded from office. The Presidential Government, by its nature, divides political life into two halves, an executive half and a legislative half; and, by so dividing it, makes neither half worth a man's having--worth his making it a continuous career--worthy to absorb, as Cabinet government absorbs, his whole soul. The statesmen from whom a nation chooses under a Presidential system are much inferior to those from whom it chooses under a Cabinet system, while the selecting apparatus is also far less discerning. All these differences are more important at critical periods, because government itself is more important. A formed public opinion, a respectable, able, and disciplined legislature, a well-chosen executive, a Parliament and an administration not thwarting each other, but co-operating with each other, are of greater consequence when great affairs are in progress than when small affairs are in progress-when there is much to do than when there is little to do. But in addition to this, a Parliamentary or Cabinet Constitution possesses an additional and special advantage in very dangerous times. It has what we may call a reserve of power fit for and needed by extreme exigencies.