There is lots of discussion at present about the concept of globalization because we are in a period of adjustment and change. Possibly dating back to the years soon after the end of WWII, one group of countries in general has been at the forefront of economic development and has realized the benefits of that position. These so-called First World countries have enjoyed prosperity for the countries as a whole and for many of each country's citizens as their industrial systems have developed, providing employment and disposable income to the population and bases for trade and commerce between nations.
Now, so-called Third World countries are trying to develop their own systems so they can become less dependent upon others. This creates significant amounts of new competition in the trade markets, leads to unemployment in First World countries when jobs are shipped overseas to countries where the work can be done at lower cost, and creates concern for the environment. (First World countries developed their industries without much concern for environmental impacts. Now, Third World countries want to develop in the same manner but a similar pattern of pollution and waste-production may have more far-reaching consequences.)
In my opinion, globalization is essential for the eventual good of all. However, change is difficult and painful - I think it's going to be a long and contentious process.