This book presents the first systematic evidence on long-term trends in global well-being since 1820 for 25 major countries and 8 regions in the world covering

The United States is in the midst of a major demographic shift. In the coming decades, people aged 65 and over will make up an increasingly large percentage of

Recruiting an all-volunteer military is a formidable task. To successfully enlist one eligible recruit, the Army must contact approximately 120 young people. Th

"The ongoing COVID-19 pandemic marks the most significant, singular global disruption since World War II, with health, economic, political, and security implica