When sea power finally gives place to air power in transport and war, we shall have seen one of the basic revolutions in history. The influence of geographic factors diminishes as technology grows. The character and contour of a terrain may offer opportunities for agriculture, mining, or trade, but only the imagination and initiative of leaders, and the hardy industry of followers, can transform the possibilities into fact; and only a similar combination (as in Israel today) can make a culture take form over a thousand natural obstacles. Man, not the earth, makes civilization. III.
