Interesting question, that the title poses.
We didn't learn the lesson that the English and the Russians learned in Afghanistan, and now we are closing in on 15 years there ourselves.
We didn't learn the lesson the French learned in Vietnam, and we were mired there for 15 years.
The proxy wars of 2 superpowers, send troops to far away places, should be a thing of the past, by now.
Bolton's answer to most problems is to send more troop, more bombings, etc.
While I am now Colin Powell fan, I do agree with the Powell doctrine of bring enough force, having a clear objective, and a clear exit strategy.
One one hand, Trump is against sending troops to engage in long drawn-out affairs.
On the other hand, he talks of "knocking the hell out of" and wiping off the face of the earth", etc., a mixed signal, unless he were to follow the Powell doctrine.
While I am no isolationist, I tend to side with Rand Paul here. Bolton's history is one of all the other "war" experts that come on TV. Most of these have ties to lobbyist groups, military contractors, etc.
I think we would all agree that we should be careful when and how our troops our deployed.
It is our family members who will do the fighting, not theirs, for the most part, and they should ask the basic question:
"What would I do if that were my child going off into harms way?"
We should hold ALL politicians to this standard.