Once a Warrior King by David Donovan

This book, which entirely changed my outlook on politics, is a memoir that describes the experience of a soldier who not only confronted the enemy at close quarters, but had an insight into the infrastructure of the war effort and how it was designed. His analysis of the war in this book, which is more about the theory of war and the psychology of winning, showed me how repeated failures come about: through repeated failures of method, which relate to failures of intent.

It's worth reading. So is the brand-new Interview with A Warrior King: David Donovan Speaks out, an interview with its author.