Should the United States Get Involved in Other Countries Affairs?

The United States should only get in other countries affairs when the country needs help or if they ask for help like in Cuba if the united states had not tried to help the Spanish then they would never have gone to war
Or like in Iraq, Iraq never asked for help so U.S. didn't need to help them unless they ask or need help from the U.S.
The only time the U.S. should get involved is If the U.S. has a national threat then they should get involved like for instance WW1 it was a good thing that U.S. had gotten involved when Great Britain intercepted the Zimmerman note that was a possible threat to the U.S. so it was a good thing that America got involved