COTTonLINE's favorite foreign affairs analyst is George Friedman. He writes at Geopolitical Futures about our Cold War-ish struggles over who has "strategic depth," these now ongoing with both Russia and China.
Friedman compares and contrasts the two and looks at likely outcomes. His reasoning is too complex and multifaceted to summarize here. If these issues interest you, his column will repay your time to read it.