Why do big, wealthy nations that can produce all goods still participate in global trade?

Answer:Countries trade with each other when, on their own, they do not have the resources, or capacity to satisfy their own needs and wants. By developing and exploiting their domestic scarce resources, countries can produce a surplus, and trade this for the resources they need.

Explanation:Goods and services are likely to be imported from abroad for several reasons. Imports may be cheaper, or of better quality. They may also be more easily available or simply more appealing than locally produced goods. In many instances, no local alternatives exist, and importing is essential. This is highlighted today in the case of Japan, which has no oil reserves of its own, yet it is the world's fourth largest consumer of oil, and must import all it requires.

Clear evidence of trading over long distances dates back at least 9,000 years, though long distance trade probably goes back much further to the domestication of pack animals and the invention of ships. Today, international trade is at the heart of the global economy and is responsible for much of the development and prosperity of the modern industrialised world