@Selaphiel
You could petition local government to start a genocide / ethnic-religious cleansing if you’d like.
Turkey’s doing it. China’s doing it. I think India wil probably do it, and if Israel isn’t doing it now, they will soon. Heck, Indonesia is actively reducing its own population.
So it’s not like people aren’t already trying to curb a huge chunk of the population. You could contribute by signing up into active military service or making donations to the above countries.