Book excerpt: America is facing the most dangerous and complex geopolitical environment since World War II. Ensuring the adequacy and flexibility of our defense budget is essential to keeping our nation secure and the world safe for global democracy. Defense Budgeting for a Safer World brings together the ideas, perspectives, and solutions of America's most renowned experts on national security and the defense budget. The volume originates from a conference held at the Hoover Institution in early 2023 and reflects the presentations, discussions, and debates among military and civilian leaders. Drawing on their remarkable experience leading the Pentagon, the services, Congress, and academe, these experts lay out the key priorities in reforming, realigning, and rightsizing the budget amid current challenges. Several topics converge: national security threats, strategy, technology and innovation, personnel, reform options, and the politics of the defense budget. This unique compilation covers each of the major areas of debate in forging and sustaining a defense budget capable of supporting the nation's security needs.