"War and unity. Lectures Delivered at the Summer Meeting of Cambridge University Lecturers in 1918" is a collection of speeches in which the authors consider important issues related to war and national unity. The book offers readers thoughtful analyzes and opinions of famous scientists and researchers, which help to better understand the socio-political situation of that time. The authors draw attention to important aspects of war, international relations and the need to preserve unity among peoples. This book is a valuable resource for the study of history and international relations during the First World War.