Your subtitle is "direct confrontation". What does "direct confrontation even mean"? If America sends troops to Ukraine or Taiwan, Russia/China will always have more. "Addiction" - A lot of that is marijuana, which the U.S. military mis-classifies as "addictive". Alcohol is actually addictive, and Russia has a way higher problem with that than Americans have with alcohol or marijuana. "Behavior" - I really doubt that Americans are less able to function in teams than Russians or Chinese are; in fact, I bet that even Americans rejected from the U.S. military are far better fits for teamwork than your average Russian or mainland Chinese. "Physical fitness" - Yes, Americans are fat, but frankly, I think a fighting force that's fat is going to fare better in warfare than a chronically undernourished fighting force like those of Russia and mainland China. In a real bad war, Americans will lose their fat quickly and have a lifetime of well-supplied nutrition and MREs to leverage, as opposed to the crap for food that Russians and Chinese eat. (I've traveled alone all over China and am fluent in Chinese, and I'm an Orthodox Christian and have been to the FSU a lot. I know. People ask me "Wasn't Chinese food in China wonderful?" I say "No, because quality of your ingredients really matters.")