Still, it is instructive to note to what extent in the sphere of practice the principle of Determinism is admitted. In dealing with the drink question, for instance, temperance reformers argue that a diminution in the number of public-houses, and the creation of opportunities for healthy methods of enjoyment, will diminish temptation and weaken the desire for alcoholic stimulants. In the training of children stress is rightly laid upon the importance of the right kind of associates, the power of education, and of healthy physical surroundings. With adults, the beneficial influences of fresh air, good food, well-built houses, open spaces, and healthy conditions of labour have become common-places of sociology. In every rational biography attention is paid to the formative influences of parents, friends, and general environment. Medical men seek the cause of frames of mind in nervous structure, and predisposition to physical, mental, and moral disease in heredity. Statisticians point to absolute uniformity of general human action under certain social conditions. Moralists point to the power of ideals on people's minds. Religious teachers emphasize the power of certain teachings in reducing particular habits. In all these cases no allowance whatever is made for the operation of an undetermined will. The motive theory of action may not be consciously in the minds of all, but it is everywhere and at all times implied in practice. In strict truth, we cannot undertake a single affair in life without making the assumption that people will act in accordance with certain motives, and that these in turn will be the outcome of specific desires. If I journey from here to Paris I unconsciously assume that certain forces--the desire to retain a situation, to earn a living, to satisfy a sense of duty--will cause all the officials connected with boat and train service to carry out their duties in a given manner. If I appeal for the protection of the police I am again counting upon certain motives influencing the official mind in a particular manner. All commercial transactions rest upon the same unconscious assumption. A merchant who places an order with a firm in Russia, America, or Japan, or who sends goods abroad, counts with absolute confidence upon certain desires and mental states so influencing a number of people with whom he has no direct connection, that they will co-operate in landing the goods at the point desired. Or if the goods are not transmitted as desired, it is not because the principle upon which he relied is invalid, but because other desires have operated in a more powerful manner. A general commanding an army acts on precisely the same principle. The ideal of duty, of the honour of the regiment, the desire for distinction, are all counted upon as being powerful enough to serve as motives that will cause men to join in battle, storm a risky position, or take part in a forlorn hope. History is read upon the same principle. The statement