By using sources such as Mizan ul-Hak, Dustur ul-Amel, Tarih-i Kostantiniyye ve Kayasıre and Tarih-i Frengi Tercumesi, this book analyzes Katip Celebi, one of the most prominent intellectuals of the 17th century. Katip Celebi, who might be seen as a renaissance man, was an influential thinker who contributed to a variety of different fields including history, politics, naval warfare, society, philosophy, Islamic law, and many others. This book aims to explore Katip Celebi’s thoughts on 17th century crises, including his ideas on how to reform the Ottoman state structure. It discusses his ideas on society and authority which are grounded in reason and religious law simultaneously. This work suggests Katip Celebi provided an authentic intellectual perspective that was critical of different sides in the above-mentioned debates and provided a moderate and balanced approach when analyzing various issues.