The general effect of improved machinery has been several times referred to already. Its advantages come to the wage-earner directly in multiplying employments and in multiplying the demand by cheapening products. Indirectly, the benefits are still greater, because these cheaper products form the bulk of living for the workers. It is probable that even the better living thus provided has raised the efficiency of labor so as to command better wages. It is certain that every movement of civilization which gives a clearer knowledge of human nature and the world about us adds to the power of every man, whatever his work. We may welcome every element of progress in this enlightenment as a direct help to the portion of humanity recognized as wage-earners. The better the masses of people understand each other the better each understands himself; and that understanding is the best protection against oppression of circumstances or of men. _Variation in profits._—Profits in various pursuits, like wages, are affected by limited competition. The need of special abilities and experience in any particular undertaking keeps back the timid from that enterprise, and the accumulation of experience of a peculiar kind hinders one from turning to other occupations. Even if a young man is willing to take the risk of inexperience as a manager, he can seldom gain the confidence of those who control capital. Hence competition in new and untried enterprises is slight, and profits are often great. Other undertakings are of such a nature as to involve great uncertainty. The risk of failure retards the cautious, and so the most enterprising win great returns. In estimating such returns, we overlook the failures and count only the great successes. Sometimes accidental opportunities open to the few a limited range of enormous profits. Legislation fostering monopoly sometimes favors such opportunities. These are usually temporary, and such advantage cannot long be maintained under the most fortunate conditions. Secret methods have sometimes controlled the market for individuals with enormous gain, and in a few instances a nation has maintained such secrecy with apparent success. But these, too, quickly yield before competing enterprise, since wage-earners under such employers must share to some extent the secret, and will have the stimulant of enormous profits to use the secret for themselves.