With us killing the environment more and more, it might be good to have less people on the planet.
Yes, but how do we do that without there being chaos?
We don't want unrest like in Children of Men or A Handmaid's Tale.
There will always be unrest, with everyone having a camera in their pocket means anything anyone does can (usually does) lead to unrest, police arrest someone or use "unnecessary force" its all over the news within hours. People kill each other every day over drugs, money, and sometimes even less. In the US we have issues with many different drugs (including prescription drug abuse) but we also help save all the individuals who OD and such which costs thousands of dollars per person, we should do the bare minimum, let people make the choices they want and if it leads to their death then so be it.
It's hard to draw the line on when a choice is indeed personal choice and when it's more environmental.
As a Brit in the US, I can't see gun deaths as a necessary evil or a choice or anything like that - the whole concept of everyone being armed boggles the mind, whereas some (most?) Americans see it as the cost of doing business.
Ditto the opioid issue - is addiction a personal choice, particularly if it's been shown to be linked to overprescription and generally drug-company driven?
It's not that straightforward: a lot of US policy is driven through under the guise of "personal choice/bootstraps", and here you are with massive tax cuts for the highest earners and underfunded public services.
tldr: "personal choices" do not happen in a vacuum, you're constantly influenced by your environment.