The Seven Years' War can support many arguments because it spans different theatres, institutions, and national aims. A strategy suited to Britain, the United States, France, China, or Australia cannot simply be transferred to another state. Even writers from the same country may emphasize different evidence when arguing for an army-led or navy-led policy. The theorists who used this war were writing for particular national circumstances, a context readers need to keep in mind when drawing lessons today.
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Strategy must fit national circumstances
The closing lesson is not a single universal formula, but the need to derive strategy from a nation's own geography, resources, priorities, and historical situation.