The forces of Hannibal, Drake and Napoleon moved at best with the horses' gallop or the speed of wind on sail. Now, aviation brings a new concept of time and distance to the affairs of men. It demands adaptability to change, places a premium on quickness of thought and speed of action.
Military strength has become more dynamic and less tangible. A new alignment of power has taken place, and there is no adequate peacetime measure for its effect on the influence of nations. There seems no way to agree on the rights it brings to some and takes from others.

Aviation, Geography, and Race (1939)