Who said "War is never the first option; it's the last."?

This quote is attributed to Tony Stark / Iron Man.

War is never the first option; it's the last. - Tony Stark / Iron Man

"War is never the first option; it's the last."

Tony Stark / Iron Man War

"I am Iron Man."

"Genius, billionaire, playboy, philanthropist."

"If you're nothing without the suit, then you shouldn't have it."

"The difference between you and me? I'm not afraid."

"Some battles are worth fighting."

"Sometimes you have to become the monster to stop the monsters."

"Skynet sent me back through time to kill you."

"War teaches us the value of peace."