[dTal]

I don't think this argument is logically sound. The assertion that this (and every other!!) technological innovation is a "net positive" merely because of our monotonic population growth is both weakly defined and unsubstantiated. Population is not a good proxy for all things we find desirable in society, and even if it were, it is only a single number that cannot possibly distinguish between factors that helped it and factors that hurt it.

Suppose I invent The Matrix, capable of efficiently sustaining 100b humans provided they are all strapped in with tubes and stuff. Oh and no fancy simulation to keep you entertained either -it's only barely an improvement on death. Economics forces everyone into matrix-hell, but at least there's a lot of us. Net positive for society?

[mapontosevenths]

Human fecundity is probably not actually the meaning of life, it's just the best approximation most people can wrap their heads around.

If you can think of a better one, let me know. Be warned though, you'll be arguing with every biological imperative, religion, and upbringing in the room when you say it.