In 2000, the United States was among the global leaders in educational attainment, boasting the third-highest percentage of its 25- to-64-year-old population with a postsecondary degree across the 38 Organization for Economic Co-operation and Development (OECD) nations. However, over the past two decades, the U.S. has gradually slipped in the rankings, falling to ninth place by 2022 even as the percentage of the population with a postsecondary degree increased from 36% to 50%. As international competitors like Japan, Canada, South Korea, and the United Kingdom continue to outpace the U.S.’ growth, the U.S. faces many challenges in maintaining its competitive edge in an increasingly educated world.