Chinese domestic policy attempts to limit families to one offspring.
The Chinese culture favors male children.
Female infanticide is a consequence of this policy.
In the future, there will be a shortage of females, and lots of young males who will not be “civilized” by pairing with a female, and the responsibility of fatherhood and family.
What happens to the world when a few billion irresponsible, uncivilized, frustrated males get restless?