If I should mark the area of the world I personally would consider to be the most probable location for best survival in worst case scenario with all of the above taken in consideration, as well as other facts, historical evidence, earth cycles and ages, contacts and sources, and personal research and experiences in various matters - I would think the highlighted area in the below map nails it pretty well, just have to remember what I said about possible flood areas, vulcanic and seismic activity, and storm probabilties etc as displayed above.
Of course, that's based on my observations, and all things are subject to change - but personally I'd put my money on this area so to speak. When it comes to latin america I'd mark chile and north-west, upper north and north-east area of Argentina as well including most of Brazil as "safe places" per my view on it.
-Edward Alexander