不幸的文明家家相似,幸福的文明家家不同。文明的消亡,一般有两个原因,其一外敌入侵,其二生态恶化。比如吴哥古国的覆灭,就与崛起的暹罗大举入侵有直接的关系;而玛雅文明的衰落,根据较近的研究认为,与数十年中接踵而至的数次大干旱有直接的关系。然而有一个文明,在早期被其他民族连年攻伐,不得不多次踏上颠沛流离的迁徙之途,却始终 Unfortunate civilized families are similar, happy civilized family is different. The demise of civilization, there are two common reasons, one of the invasion of foreign enemies, the second ecological deterioration. For example, the destruction of ancient Angkor is directly related to the rise of the massive invasion of Siam. The decline of Maya civilization, according to recent studies, is directly related to the ensuing generations of major drought in decades . However, there is a civilization that has been attacked year after year by other ethnic groups and has had to embark on the path of displaced migration.