Since war ceased to be a matter of the privy purse and began to demand the cooperation of every citizen and the coordination of every resource, a knowledge of the general, basic laws of economics has become a vital necessity to the education of the military services. When peace, with its constructive program, insists upon the conservation of the strength, resources and funds of the treasury, the Navy still has an economic mission to perform. Logistics is the science of preparedness; and preparedness is a matter of peace, not war. A naval officer’s career is normally a narrow, straight road of operation running through a wide country which is logistics. Without a knowledge of economics, the landmarks along the road are almost impossible to recognize in time to be of use.