Thank you, Paola, for the encouraging note!
Yes, I did contact a professor in Oxford, whose interest includes Geopolitics. However, it as a longthy email only. sketching out my thesis isead in about a paragraph. I wanted to see if he thought my idea on a thesis had any traction. He hasn't replied in about a week. And then I discovered that for DPhil, being an entirely reasearch program, did not offer basic courses in Geography. Also, I learned that for UK professors, a thorough and formal thesis proposals are expected. I am afraid since I only sent an email, detailing my thesis idea, instead of books, he may not reply to my email anymore...