They were supported by white America's reaction against Nazi racism and - much more - by the imperatives of Cold War competition.
But in balancing the imperatives for security and diplomacy, improvements in one come at the expense of the other.
So we received a tricky set of imperatives: Meet the unspoken standard without thinking about it too much.
mid-15c., in grammar; later "something imperative" (c.1600), from Old French imperatif and directly from Late Latin imperativus (see imperative (adj.)).
A grammatical category describing verbs that command or request: “Leave town by tonight”; “Please hand me the spoon.”