If the ability to communicate complex ideas in an easily understood way is a valuable skill to the strategic thinker, then first principles offer one possible point of departure from which to begin any discussion on strategy.
President Putin made three foundational assumptions in launching his war against Ukraine that should have been correct but were not. First, Putin assumed the invasion of Ukraine would be a quick and easy fight. Second, he assumed the world would denounce the invasion but tacitly allow it. Third, Putin assumed the war would deter NATO expansion.