I think to a degree we should have. In WWII I think entering the war was necessary after Pearl Harbor, but nowadays I think we need to focus on America first, and stop worrying about every little thing in other countries. America has a lot of problems it needs to fix, and pulling out of other countries affairs would be a good way to do so.
The Kepler theory about Planets
Answer:
earths climate changed the plant eaters did not eat and then the meat eaters eventully died out
Explanation: