United States, China, Russia and Germany. This aforementioned nation's are seen as the most powerful nations of the world they all have a strong economy, strong economy is the beginning of a powerful nation.
My understanding is that apart from the countries you mentioned above, which are economically strong countries, I think there are other countries that are stronger if you talk about the economy, such as Kuwait, Bahrain, you can imagine the US$ exchange rate: US$ 3.25 (1 KWD) Kuwait's currency can beat the dollar and pound sterling, this shows that the country is economically the most prosperous and strongest.
I think the countries that dominate the world, the main factor that makes them dominate the world, is their war and military equipment, such as America, Russia, China, that's possible, the proof is that these countries still owe money to the World Bank and other countries, The proof is that they are not strong from an economic perspective, they are only influential in military strength, on that basis they are said to be strong, not from an economic perspective.