SEOUL – In mid-November, all eyes will shift to Seoul, when G-20 leaders convene for the first time in the South Korean capital. The choice is long overdue, as South Korea is a remarkable success story: in one generation, the South Koreans, formerly pummeled by civil war, under constant threat from their Northern communist brethren, long mired in poverty, and ruled by military dictators for 40 years, have built the world’s 13th largest economy and Asia’s most vibrant democracy.