Aprophetic amateur of history surveying the world in the opening of the seventh century might have concluded very reasonably that it was only a question of a few centuries before the whole of Europe and Asia fell under Mongolian domination.

• 假如一个具有预言能力的历史爱好者全面考察一下7世纪初的世界，他也许会得出一个非常合理的结论：整个欧洲和亚洲陷入蒙古人的统治之下只不过是几个世纪的问题。