Book excerpt: In the last two decades of the 20th century, we witnessed a dramatic growth in social inequalities within and among countries. This has had a most negative impact on the health and quality of life of large sectors of the populations in the developed and underdeveloped world. This volume analyzes the reasons for this increase in inequalities and its consequences for the well-being of populations. Scholars from a variety of disciplines and countries analyze the different dimensions of this topic.