The countries exist independently with each other but they are also connected with one another. The earth is just one and it contains all the countries that we live in. As all are connected due to one location even if different environment. We have only one planet and all lives in here. But if you look into the specific areas it seems it is a big world. But if you look at the global perspective as one which is contained by the world, you can see a different view.
There are many ways that people are connected with each other in different countries. That is why there already exist of the study of international studies that would let a student understand many things. It just not focus on the international safety but also in business and in the public or private one. The study does not limit t the public or private institutions but it caters to both. It lets a student understand foreign policies and how to use it.
Many have understood the importance of studying this topic as it is also essential not just for doing trade and for the security of the country but also for many reasons that can affect the lives of people. There could be laws that were already signed by the different nations that each should do for a common goal and if you do not know about it, you could have a different perspective than when you know it.