在此之前，无论是古希腊哲学家，还是阿拉伯哲学家，基本上局限在神学问题的范畴内，而伊本·赫勒敦认为，要研究人们所生存的这个世界。
Erenow, no matter what is ancient Greece philosopher, or is Arabic philosopher, basically confined to category of theological problems. Ibn Khaldun consider to study this existent world to people.
14世纪的阿拉伯思想家，伊本。赫勒敦说过，坠落中的文明可以因为模仿那些成功的文明国家而不至于土崩瓦解。
The fourteenth-century Arab thinker Ibn Khaldun said that civilizations in decline were able to keep from disintegrating by imitating their victors.
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