Summary: Humanity faces long-term problems, with population aging and decline being a major concern. Fertility rates are falling globally, and the U.S. may struggle to maintain its population without large-scale immigration. This trend could threaten living standards, but there are currently no effective solutions to reverse it.
There are plenty of reasons why an aging, shrinking population is a threat to the living standards that we currently, and to ignore these is simply to bury your head in the sand. (View Highlight)