48 In the social field we have the development of social insurance and, in the more economically advanced communities, the introduction of social security systems. Men in labor unions are showing a more responsible awareness of the major social and economic problems. There is a progressive improvement in basic education, a wider distribution of essential commodities, greater opportunities for advancement in industry and the consequent breaking down of class barriers, and a keener interest in world affairs shown by people of average education. At the same time, however, this assessment of the increased efficiency of social and economic systems in a growing number of communities serves also to bring to light certain glaring discrepancies. There is, in the first place, a progressive lack of balance between agriculture on the one hand, and industry and public services on the other. Secondly, there are areas of varying economic prosperity within the same political communities. Finally—to take a world view—one observes a marked disparity in the economic wealth possessed by different countries.
Source: Mater et Magistra (Vatican.va)