=Present Currency of This Ideal.=--In spite of the extraordinary currency of this ideal at present, there is little fear that it will be permanently established. Human nature is too rich and varied in its capacities and demands; the world of nature and society is too fruitful in sources of stimulus and interest for man to remain indefinitely content with the idea of power for power's sake, command of means for the mere sake of the means. Humanity has long lived a precarious and a stunted life because of its partial and easily shaken hold on natural resources. Starved by centuries of abstinence enforced through lack of control of the forces and methods of nature, taught the gospel of the merit of abstention, it is not surprising that it should be intoxicated when scientific discovery bears its fruit of power in utilization of natural forces, or that, temporarily unbalanced, it should take the external conditions of happiness for happiness itself. But when the values of material acquisition and achievement become familiar they will lose the contrast value they now possess; and human endeavor will concern itself mainly with the problem of rendering its conquests in power and efficiency tributary to the life of intelligence and art and of social communication.[174] Such a moral idealism will rest upon a more secure and extensive natural foundation than that of the past, and will be more equitable in application and saner in content than that with which aristocracies have made us familiar. It will be a democratic ideal, a good for all, not for a noble class; and it will include, not exclude, those physical and physiological factors which aristocratic idealisms have excluded as common and unclean. § 3. SELF-LOVE AND BENEVOLENCE; OR, EGOISM AND ALTRUISM