东北亚地区的最近邻国肖向前第二次世界大战以后半个世纪没有世界大战，保持了相对和平的大局。这使２０世纪前半叶与后半叶形成了强烈的反差，因为可称得上世界大战的战争都发生在２０世纪前半叶。这证明“物极必反”是辩证法的真理。但是这还必须用当今人类实践的历史加... The closest neighbor in Northeast Asia has not waged world war in the past half a century or so after the Second World War and maintained its relatively peaceful overall situation. This made a sharp contrast between the first half of the twentieth century and the second half, for the wars that could be claimed as world wars occurred in the first half of the 20th century. This proves that “materialism is the truth” is the truth of dialectics. But this must also be done with the history of today’s human practices plus ...