What are the motifs in The Moon Is a Harsh Mistress by Robert A. Heinlein?

War is a motif. The Moon Is a Harsh Mistress deals heavily with war. The Federated Nations (FN) could deliver a "Doomsday" bomb that would split rebellious Luna like a melon and monopolize space travel. Smaller H-bombs, which Loonies cannot intercept, could cave in most of the underground population centers. Because they face starvation by 2082, however, Loonies cannot give in to Terra; they are cornered rats, preferring to live in peace but certain of being attacked. They must, therefore, adopt the ancient Chinese approach of sapping their opponent's will until he surrenders without fighting. Luna has certain "pieces in the game" and many possible moves, while Terra has far more resources and a larger "spectrum of responses." The point is to get them to waste their superior strength. Luna needs a perfectly timed chain of events which favors its strategy.