~I do not agree with your point of view, although the countries have mutual economic support through the export and import process but this process did not create too much development, the development came from competition, look at the crypto market, you can also see this process, most countries have specific products and cannot be copied by that country.
A healthy competition isn't going anywhere, and you are right, it helps economic development. I was rather talking about the unhealthy one, when one country(or a block of countries) desires to be ahead no matter what. If they can't grow economically, they are rooting for their adversaries to decline. This type of "competition" ended not so long ago, but fortunately for ever.
Moreover, the US is a fairly strong country in the military, the weapons are a very expensive brand and the US is very developed in this field, China is always difficult to surpass the US with current technology.
Absolutely agree with you on this one. Overall, any governmental propaganda telling their citizens they have better armed forces than the U.S. are just lying.