> "Every single ancestor I had from my parents back to algae had offspring. What if I don't?

A large proportion of your ancestors offspring didn't themselves have offspring.

Why would you have children if you live in a cramped apartment in an equally cramped and dangerous city? The amount of effort you're putting in for that tiny life is barely enough for subsistence, much less for having children.

The answer to that isn't having material wealth, especially when you get no time left over to appreciate it. So the problem is having enough time when you waste most of it toiling for the dreams of another man, and for next to nothing in return. Because that's the real economy. (If you do, though, then congratulations I guess, but then you're not in the position of most people anyway.)

I think, however, that you'd change your mind about things if you had the freedom, the space, and the ability to grow your own food. Then you'd see how foolish most city dwellers actually are. As for the philosophical musings about whether you should have children... Well, it's your life, man. If you don't want a shot at prolonging your true legacy, then that's up to you. But you're certainly doing a service for everyone else who do want their kind to succeed.

For me it was just a realisation that reproduction is just one way we pass ourselves on, but one that has a lot of evolutionary push to make us want to do. For me, I was just born without that push for whatever reason. I'm not sure if it's a symptom of undiagnosed asperger's that I suspect or some other thing like that. Regardless of the reasons why I don't possess that drive, I don't think children are the only way we pass on. In fact I think every action we do is a form of reproduction, including building stone walls. Maybe people think that there is something inherently different between biologically producing a living being and other forms of interacting with the world but I don't believe so personally.

In terms of your moment in your 20s, the way I see it is that it goes beyond my conventional existence as a human: I'm not just the product of all my direct ancestors, but also of all the causes and effects which have effected those ancestors. It's obvious that I am the continuation of my great great great grandfather, however I am also the continuation of my great great great grandfathers lunch that fed him, or doctor that saved him, or the Sun that supported him. Reproduction is an essential component for continued existence of sentient beings, but so is food, so is warmth, so is water. I feel that the Sun is just as much my parent as my biological parents.

Something like 10% of all humans that have ever lived are alive today.

I have three kids.

It is wonderful.

Tiring, taxing, exhilarating, inspiring.

It works for me. I make no claims for others.