During different time periods there were different civilizations that dominated the trading world during their time. At different times, Muslims dominated spice trade, Corinth dominated trade in the west until the sixth century BC. To answer more specifically, I would need to know what time period you specifically want to know about.
The Portuguese.
Because the Portuguese dominated the Saharan trade routes.
Spices
Chinese trade was dominated by foreign influence
England
the dutch are the people who dominated the clove trade
Britain dominated the Atlantic slave trade.
Australia
The Portuguese.
The British were the dominant nation of the slave trade.
The Mediterranean Sea.
gold and salt
Because the Portuguese dominated the Saharan trade routes.
In the eighteenth century, the bourgeoisie, or the middle class, dominated trade nationally as well as internationally. They mostly lived in larger cities.
Britain
England and France
camel