For the US, Europe has always been the buffer zone between them and the Soviet Union, that theater on which that war that luckily didn't grow hot would happen.
The Atlantic and Pacific Oceans are indeed our buffer zones. NATO was formed to keep Russia from further implementation of Buffer states that are populated and subservient to Russia. There is a certain advantage to have thousands of miles of water around your country There is no real practical way for a buffer state scenario here. And the US doesn't rule the Atlantic and Pacific.
You might want to claim that the US was protecting itself. Yes, in some form it was. It was also protecting allies. Not many western countries wanted to be living under Stalinist/Russian rule. Stalin and his replacements have rather different methods of handling disagreement. Command Economies are not popular among people who prefer to set their own goals. Seeing the difference between East and West Germany, and the Stalinist attempts to starve West Berlin - a Kind of mini holodomor if you will, and the resulting Berlin Airlift, told us what we needed to know about Stalin's plans.
Claiming that you're protecting your shield and getting angry that your hands have gone too little and weak to carry it is funny, but pathetic.
Don't mistake trolling for anger. and your little hands comment is kinda weird. I thoroughly enjoy pissing you and your ilk off, it feeds me.
Now to weakness - probably not our time to fall yet. Countries do not stay at or near the top forever, and that's a fact. Too much competition, and the so called "Grand Experiment" here in the US will eventually fail. There is no Roman Empire today. There is no British Empire today. No Soviet Union. The question is what will replace the US when that eventually happens?
Of today's players - who do you want to replace the US, and hold the power against the other countries that want the position. Name it. A question of utmost simplicity, no trolling, no humor, no little hands, no patheticness. No name calling. Name the country.