According to the agency’s “low-variant” projection, historically the most accurate, by 2050 three out of every four countries in the less developed regions will be experiencing the same kind of below-replacement fertility that is hollowing out the populations of developed countries today. Such stark drops in fertility, cautioned the UNPD, will result in a rapid aging of the populations of developed and developing countries alike. With the number of people over 65 slated to explode from 475 million in 2000 to 1.46 billion in 2050, existing social security systems will be threatened with collapse. It will prove difficult, if not impossible, to establish new ones.
Michael J. Miller translated Introduction to the Mystery of the Church by Benoit-Dominique de la Soujeole, O.P., for Catholic University of America Press.