Who said "The most powerful tool is not a weapon, but an idea."?

This quote is attributed to William Halsey.

The most powerful tool is not a weapon, but an idea. - William Halsey

"The most powerful tool is not a weapon, but an idea."

William Halsey Power

Military Admiral American 1882–1959

"Hit hard, hit fast, hit often."

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"Damn the torpedoes, full speed ahead!"

"Power without control is just destruction."

"Power is not about control, it's about influence"

"The world doesn't need me to be the hero. It just needs me to be dangerous."

"The claws come out when I need them to."