"Early examples of war as metaphor in US political discourse include J. Edgar Hoover's "war on crime" in the 1930s". We've been using it as a metaphor since 19

"Early examples of war as metaphor in US political discourse include J. Edgar Hoover's "war on crime" in the 1930s". We've been using it as a metaphor since 1930's. It hasn't impaired the "real" usage of the word "War" so far. I doubt it will in the future.