Qadi Sa Id's Introduction to His Tabaqat Al-Umam‪.‬

This article provides a critical assessment of the first chapter of Tabaqat al-Umam of Qadi Sa id al-Andalusi who died at Toledo in 1070 CE. This book is a slender volume of great importance for the history of science in antiquity and early Middle Ages. The first chapter, simply called "Introduction", is described here in detail and its merits and demerits are considered. Keywords: Tabaqat al-Umam of Qadi Sa id al-Andalusi; history of science in Antiquity and early Middle Ages; early Muslim scholars and geographers; history of nations.