Of course... it is more complicated than that. This is a classic tragedy of the commons scenario (or Idiocracy for that matter). The people that don't care will continue on, and the people that do care won't be able to influence the next generation nearly as much.
IDIOCRACY Opening Scene (2006) Mike Judge
and find a way to work towards something of a solution in your daily life. The work may not go anywhere and the problem may be intractable, but by not having kids and doing some work towards a solution, its at least a local anesthetic for hopelessness.
We had population control 300 years ago before we had the knowledge to create machine and feed them.
Less than 1billion people on the planet and most people starved.
Knowledge gets created by freeing up time to allow humans to focus on other things than just getting their basic needs met.
This requires machines which require energy as energy is the industry that powers all other industries.
If you really believe we live on a planet with limited resources with no way of creating new, then you, being on Hacker News wasting energy on debating with strangers, seems like an unjustified behavior in itself. So maybe if you acted on what you seem to be preaching I would listen, but for know you don't seem to care about these supposed finite resources.
We do not have 'resource limitations' for the most part on this planet.
For some things, there's an issue - but by and large, it's not.
Western Nations already have a considerably lower than 'replacement rate' in terms of birth, and the suicidal disappearance of some cultures is not going to move the ball forward.
We do have population issues, but they are squarely in Nigeria, India etc..
We have plenty of resources.
We'll sort out climate change over the coming decades.
I don't know where you even come up with this stuff.
Don't have kids.
I know this is a very unpopular point of view on HN and this response will probably be downvoted into oblivion, but the fact of the matter is that if enough people adopt this strategy it will actually solve the problem eventually. Yes, the odds of this happening are vanishingly small, but population control is ultimately the only long-term solution.