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I will be graduating from BS Aeronautical Engineering in about 6 months. But over the last couple of years, I realized that I'm more passionate about Geopolitics, international relations and diplomacy. So, I'm thinking of changing fields in Masters. I intend to opt a degree in International relations, public policy and economics.
Now, as mentioned in the question, how difficult is changing majors like that? What is the attitude shown by universities toward applicants like me? And how do I go about convincing professors to take me in?