Why does North Korea behave erratically in pursuing its nuclear weapons program? Why did the United States prefer bilateral alliances to multilateral ones in Asia after World War II? Why did China become "nice"--no more military coercion--in dealing with the pro-independence Taiwan President Chen Shuibian after 2000? Why did China compromise in the negotiation of the Chunxiao gas exploration in 2008 while Japan became provocative later in the Sino-Japanese...