Originally published in 1914, this book presents the content of a series of eight lectures delivered at Cambridge University during that year by the renowned historian John Holland Rose (1855–1942). The text discusses various factors in the diplomatic crisis which led to the outbreak of the First World War. Detailed notes are incorporated throughout and an appendix section is also included. This book will be of value to anyone with an interest in diplomatic history, military history and perspectives on the First World War.