Originally published in 1937, this book was based upon the author's Hulsean Prize winning essay for 1934. The text presents a series of studies regarding the history of the Dominican Order during the thirteenth century, with analysis of its key figures, structural elements, theological approach and relationship with the broader context of the period. Appendices and detailed notes are also included. This book will be of value to anyone with an interest in the Dominican Order and the history of Christianity.