"Lawrence Freedman and Colin Gray are two of the most famous contemporary scholars of military strategy. Within the past few years, each published a book addressing different aspects of the same practical problem of strategy: defense planning. Considered to be strategy's mundane cousin, defense planning revolves around how a nation designs its military according to its views of the future. Freedman's and Gray's verdicts on the subject are very similar and simply put: we are usually wrong when we predict the future of war. This judgment is not new; indeed, it conforms with the observations of countless defense policymakers and analysts on the challenges of strategic planning in national security. However, those looking to the works of these preeminent strategists for practical prescriptions on confronting uncertainty in planning are liable to be underwhelmed."
Strategic Studies Institute: http://ssi.armywarcollege.edu/