In this paper, we use the tools offered by the recent literature on multidimensional inequality measurement to investigate the evolution of the inequality in well-being across different countries during 1975–2000. We focus on three important dimensions of life: standard of living, health, and education. Inequality in the three dimensions shows a different trend during 1975– 2000. We propose a flexible measure of well-being to quantify the evolution of overall intercountry well-being inequality. The empirical results are sensitive to different normative choices on the tradeoffs between the different dimensions. Especially the concave transformation of income turns out to be decisive for the evolution of world inequality in well-being.