Concerning the post immediately below. Perhaps the movement to have no children actually interferes with solutions to the "birth dearth." Individual humans are ephemeral. Whatever a shrinking population will do to humankind's long-term prospects, none now living will last long enough to see those consequences.
Asking the people without children to worry about the eventual consequences thereof is like asking a fruit fly to worry about winter. Both are too far in the future to be of much concern. I fear one must have children and grandchildren and care about them to worry much about the world after one's death.
