To sum up what has been said in this chapter: the economic power of a military unit (which may be composed of several independent States) depends upon (a) its capacity to defend its own territory, (b) its ability to threaten the territory of others, (c) its possession of raw materials, food, and industrial skill, (d) its power of supplying goods and services needed by other military units. In all this, military and economic factors are inextricably mingled. ... The importance of economic factors in war steadily increases as war becomes more mechanized and scientific ...
Source: Power, a new social analysis, 1938, by Bertrand Russell
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https://russell-j.com/beginner/POWER08_200.HTM
