S. Athar Husain occupied a singular position in twentieth-century English-language Islamic scholarship: a senior administrator of the Indian state who was also a devoted student of Islamic intellectual history. His career in the Indian Administrative Service, which encompassed sustained work in revenue assessment and public finance, gave him a perspective on the institutional history of early Islam that few of his contemporaries could claim. Where most English-language writers on the caliphate approached it as religious biography or military history, Husain was equipped to read it as the record of a functioning state ? one that had solved, often with remarkable sophistication, problems of taxation, judicial administration, public works, and the governance of a pluralistic empire that stretched from the Arabian Peninsula to the frontiers of Central Asia and North Africa.

The Glorious Caliphate was first published in Lucknow in 1974 by the Academy of Islamic Research and Publications (Series No. 73), an institution associated with some of the most significant Islamic scholarship produced on the subcontinent in the twentieth century. The foreword was written by Abul Hasan 'Ali Nadwi, the distinguished Islamic scholar, writer, and rector of Darul 'Ulum Nadwatul 'Ulama, Lucknow ? one of the most respected Islamic institutions in the world. Nadwi situates the work explicitly within the literature on the life of the Prophet, regarding the caliphate as a chapter of prophetic biography and the accomplishment of the apostolic mission. His commendation ? that the book is, to his knowledge, the first by a Muslim writer in English on this subject ? reflects both the importance he attached to the work and the gap in the English-language literature that it was filling.

Husain's other writings include works on the life of the Prophet and subjects in Islamic moral and intellectual life. In all of them, he brings the same combination of scholarly rigor, facility in English, and administrative common sense that distinguishes The Glorious Caliphate. The work went through multiple reprints ? a third reprint in 1980 and a fourth in 2000 ? evidence of sustained demand among English-language Muslim readers in the subcontinent and its diaspora.

The present digital edition makes this foundational text available to a new generation of readers: students of Islamic history, scholars of early Muslim political institutions, and general readers who want a reliable, readable, and intellectually honest account of the period that set the template for Islamic governance in all the centuries that followed. The bibliography, which draws on Arabic primary sources including Tabari, Ibn Sa'ad, Baladhuri, Abu Yusuf's Kitab al-Kharaj, and Suyuti's Tarikh al-Khulafa, alongside Western scholars from Gibbon and Sir William Muir to Philip Hitti, reflects the range and seriousness that distinguish this work from more popular treatments of the same period.