This book is about the achievements in administration under Omar Ibn Al-Khattab, the second Caliph after Prophet Muhammad (mAbhghp). The background of the work surveys pre-Islamic Arabs, the Islamic message as seen in the Qur'an and the ways and sayings of Prophet Muhammad (mAbhghp). The personality of Omar and the Islamic message came together over ten crucial years of the history of Islam to make of Omar one of the makers of the history of Islam.