Nothing is more certain than that each generation longs for a reassurance as to the value and charm of life, and is secretly afraid lest it lose its sense of the youth of the earth. This is doubtless one reason why it so passionately cherishes its poets and artists who have been able to explore for themselves and to reveal to others the perpetual springs of life's self-renewal. And yet the average man cannot obtain this desired reassurance through literature, nor yet through glimpses of earth and sky. It can come to him only through the chance embodiment of joy and youth which life itself may throw in his way. It is doubtless true that for the mass of men the message is never so unchallenged and so invincible as when embodied in youth itself. One generation after another has depended upon its young to equip it with gaiety and enthusiasm, to persuade it that living is a pleasure, until men everywhere have anxiously provided channels through which this wine of life might flow, and be preserved for their delight. The classical city promoted play with careful solicitude, building the theater and stadium as it built the market place and the temple. The Greeks held their games so integral a part of religion and patriotism that they came to expect from their poets the highest utterances at the very moments when the sense of pleasure released the national life. In the medieval city the knights held their tourneys, the guilds their pageants, the people their dances, and the church made festival for its most cherished saints with gay street processions, and presented a drama in which no less a theme than the history of creation became a matter of thrilling interest. Only in the modern city have men concluded that it is no longer necessary for the municipality to provide for the insatiable desire for play. In so far as they have acted upon this conclusion, they have entered upon a most difficult and dangerous experiment; and this at the very moment when the city has become distinctly industrial, and daily labor is continually more monotonous and subdivided. We forget how new the modern city is, and how short the span of time in which we have assumed that we can eliminate public provision for recreation.