Chinese - it’s been broken down here before.
Jews - In the old days since they were immigrants, they were not allowed to own land but they could own businesses and be merchants. That’s how they started lending goods for credit and started banking.
Americans - world war 2 when Europe were fighting amongst themselves they were providing supplies. Europe entered into depression due to war, America thrived. They also invited Nazi scientist and anyone with brains to work for them in exchange for being pardoned for wars against humanities. They still attract a lot of brains - talent magnet (H1B1 visa) Tesla - South Africa, Alphabet - Russia, Robinhood - Bulgaria, Zoom - Chinese, Stripe - Ireland, Nvidia - Taiwan, Cognizant - Kenya, Moderna - Lebanon. American culture which supersedes someone’s original culture.
Italians - I would argue that France is the fashion capital of the world.