If you actually want to know why 'capitalist' economies dominated, you need to look at history and numerous other factors.
Until 50 years ago, it was the British Empire that dominated. When I grew up, the dollar was weaker than the South AFrican Rand. The British Empire became wealthy due to plundering other nations, colonies, slaves, etc. So did America.
America got rich because she could set the exchange rate through controlling the Reserve currencies. It also used slavery, and now wage slavery. Computer companies use Foxtronn in China, and their 'staff' work 7 days a week and 12 to 16 hours per day. Many commit suicide.
You country has grown rich through war. The Chinese now are slowly outpacing you. Eastern IQs are far higher than American IQs. Americans have the lowest IQs in the developed world.
In Africa, your oil companies pay tuppence for labour and take our oil. Your companies pay peanuts for our minerals, etc. You rob us blind. That is why you are rich.
The creativity here is enormous. You come to Africa and look at what Africans do. They are absolutely stunning, but still we get peanuts for our goods.
There are many other factors. I really have no inclination to list them. I don't really care what you believe, and if you just want to win an argument, go find someone else. On the other hand, if you actually want to understand the world most of us do, then I suggest you start looking at the research.
Cheers, I won't respond again.