"The direct use of force is such a poor solution to any problem, it is generally employed only by small children and large nations."
This is attributed to David Friedman. I do not know which one. I found the son of Nobel Prize winner Milton Friedman, a filmmaker, and a children's entertainer. All three are likely candidates as the originator of that thought.
Isaac Asimov said, "Violence is the refuge of the incompetent."
Asimov was a Russian-born author and biochemist. He was most proud of his position as president of the American Humanist Association. He was talking about more than war. He supported developments in human rights, civil liberties, all things toward the enhancement of humanity.
Look through all of the quotes for an interesting perspective of war.