global affair is an interdisciplinary field of study that draws from political science, history, economics, sociology, public administration, and sociology. Students of international affairs study world economic relations, terrorism, diplomacy, international development, global ecology and much more.international relations (IR) or international affairs (IA) - commonly also referred to as international studies (IS), global studies (GS), or global affairs (GA) - is the study in interconnectedness of politics, economics and law on a global level.A degree in International Relations can open you up to a better understanding of the interconnected world we live in. Generally, it will introduce you to the world of politics and the social-historical impact of global development. There are some very good reasons to invest in a career in international studies. international relations (IR) or international affairs (IA)-commonly also referred to as international studies (IS), global studies (GS), or global affairs (GA)-is the study in interconnectedness of politics, economics and law on a global level. Depending on the academic institution.