There’s always the “Chinese Final Solution.”
One child limits and forced abortions.
Except for Muslims, of course. They would not want to offend them.
The Chinese solution has only slowed the rate of population growth at great human cost. No society has ever lost half its current population without pandemic, famine, war or genocide.
Those populations that have been exterminated were always minorities who were targeted by a stronger foe. It has always been bloody and violent.
A call for a 50% reduction in the current population is a call for violence.