This is probably the most profound analysis of the events leading to WW1. It is not attempting to apportion blame but analyzes considering the events, the world view, the limitations and experiences of the acting politicians, royalty and military men.
Better be kept on the shelf on display for ready reference. Just in case politicians of the future suggest to invade Afghanistan to establish whatever will be the reasoning for military intervention then. Some of the reasons and justifications given by the British imperialists at the middle of the 19th century sound very similar to what was said in the 21st.