Ash Carter served as President Obama's Secretary of Defense from 2015 to 2017. What made Ash Carter so unique among his predecessors was that by the time he became the Secretary of Defense, he'd already spent nearly 30 years working at the Pentagon. This included stints as both the deputy Secretary of Defense and as the number three in the department, a position often referred to as the acquisitions Tsar. Ash Carter is out with a new book "Inside the Five-Sided Box: Lessons from a Lifetime of Leadership in the Pentagon." This is not your conventional Washington, DC memoir. Rather, what I found so valuable about the book is that offers a grounds-eye view of how the world's largest national security bureaucracy operates. Decisions made at the Pentagon -- from the kinds of weapons bought, to the bases that are opened, to personnel decisions --  really do have world-shaping implication. This book takes you inside that decision making process. In our conversation, we kick off discussing the sheer vastness of the pentagon. The annual budget of the pentagon is about half of all discretionary spending in the US--that is, money spent on government programs excluding things like social security and medicare. This comes to over $700 billion. For comparison's sake the budget of the State Department is about $50 billion; and UN peacekeeping budget is under $7 billion. We then discuss what he thinks the US--and world--get for that huge investment. We also discuss his views of the role of the United Nations and UN Peacekeeping; and also the significance of the fact that the US has not had a secretary of defense since Jim Mattis left on December 31. If you have 25 minutes and want to learn insights from the former Secretary of Defense, have a listen. Unlock Premium Content and Other Rewards https://www.patreon.com/GlobalDispatches