In economics, internationalization or internationalisation is the process of increasing involvement of enterprises in international markets, although there is no agreed definition of internationalization. Internationalization is a crucial strategy not only for companies that seek horizontal integration globally but also for countries that addresses the sustainability of its development in different manufacturing as well as service sectors especially in higher education which is a very important context that needs internationalization to bridge the gap between different cultures and countries. There are several internationalization theories which try to explain why there are international activities. Those entrepreneurs who are interested in the field of internationalization of business need to possess the ability to think globally and have an understanding of international cultures. By appreciating and understanding different beliefs, values, behaviors and business strategies of a variety of companies within other countries, entrepreneurs will be able to internationalize successfully. Entrepreneurs must also have an ongoing concern for innovation, maintaining a high level of quality, be committed to corporate social responsibility, and continue to strive to provide the best business strategies and either goods or services possible while adapting to different countries and cultures. Absolute advantage Adam Smith claimed that a country should specialise in, and export, commodities in which it had an absolute advantage. An absolute advantage existed when the country could produce a commodity with less costs per unit produced than could its trading partner. By the same reasoning, it should import commodities in which it had an absolute disadvantage. While there are possible gains from trade with absolute advantage, comparative advantage extends the range of possible mutually beneficial exchanges. In other words, it is not necessary to have an absolute advantage to gain from trade, only a comparative advantage.