Having kids is not essential to society. Could you please explain what happens in, say, 80 years (or so) if we collectively stopped having kids? The answer is

Having kids is not essential to society. Could you please explain what happens in, say, 80 years (or so) if we collectively stopped having kids? The answer is this: human beings cease to exist. Now, that may be something you view as a goal to achieve, and in the absolutely trivial (and meaningless) sense that everything (including our existence as a species) is optional you'd have a point. Beyond that trivial and meaningless sense, however, you're simply arguing about how many children we should have.