In much of the developed world and even in countries like India and Bangladesh, birthrates are starting to decline. There are many factors that contribute to this, largely economic, but I hear it often dicussed in a negative light.
However, we live in a world that is drastically automating. Menial jobs are slowly being replaced by machines and it will eventually creep into more complex ones, this will only be more evident with the rise of Artificial General Intelligence or AGI.
As countries develop worldwide, birthrates steadily increase, then stabilize and then decline. This will eventually effect most countries and I for one believe this is a positive in the long term for the prosperity of our descendents.