Children of Men is a GREAT movie.

BTW - at the moment, we have a larger human population than the Earth can properly support. That is in part why we are destroying the climate. A population decline through a lowered birth rate seems like a good thing, especially compared to the option of an increased death rate.

Not to worry - this isn't an evil agenda. It's what people do when they are unable to feed the children they have and when the world seems like a dangerous place in which to bring new children.

Once things get under better control—IF we act wisely—at some point the decline will stabilize and people will have more children again...as needed...