Intelligence Challenges in the 21st Century
Keith Hansen

Terror and Consent: The Wars for the 21st Century
Philip Bobbitt

Wanted: Courage, Compassion and Character -- Leadership for the 21st Century
Tom Brokaw, John Hennessy, Congressman Xavier Becerra, Carly Fiorina, The Honorable Anthony Kennedy, David M. Kennedy, Jeff Raikes, Kavita Ramdas

Emerging Superpowers: Influence and Supremacy in the 21st Century
Michael A. McFaul, William J. Perry, Stephen J. Stedman

Environmental Challenges for the 21st Century: Interacting challenges and integrative solutions
Pamela A. Matson
Environmental Law Quarterly, University of California, Berkeley vol. 27, 4 (2001)

Health Policies for the 21st Century: Challenges and Recommendations for the US Department of Health and Human Services
JI Boufford, Philip R. Lee
Milbank Memory Fund (2001)

Corporate Strategy: New business strategies for the 21st century--Choose and focus
Ulrike Schaede
Oriental Economist Report (2009)

New Day New Way: U.S. Foreign Assistance for the 21st Century
Michael A. McFaul, Larry Diamond, Steve Radelet, Gayle Smith, Brian Atwood, David Beckmann, Lael Brainard, Francis Fukuyama, George Ingram, Carol Lancaster, Charles MacCormack, Larry Nowels, Ray Offenheiser Ray Offenheiser, Stewart Patrick Stewart Patrick, William Reese, Sam Worthington
Modernizing Foreign Assistance Network (2008)