Why do countries trade?

International trade is the swap of goods and services among countries. Trade enhances consumer choice and complete welfare.

Various countries have various types of factor endowments as like climate, skilled labour force and also natural resources vary among nations. Therefore several countries are better placed in the production of specific goods than all others.

Economic theory predicts all countries achieve when they specialise and trade the goods wherein they have a comparative benefit. It is true even if one nation has an absolute benefit over the other country.