I am going to start studying for an undergraduate program in international relations at a top South African university. I know that, despite the fact that South Africa's universities are the top ranked in Africa, they are not very highly ranked in the world. My question is this:
could I get admitted for a top ph.d program at a top university in America or Britan (Harvard, Columbia, John Hopskins,Yale , Oxford, London School of Economics, Kings College, etc) if I did brilliantly academically, did brilliantly at the GRE tests, and got published at top political science review journals?