The problem with that argument is that the world has ALWAYS been a terrible place for the vast majority of people to live, at least since the industrial revolution and arguably since the agricultural revolution. The now vanishing middle class, an artifact of post war economic boom, was about the only time ever it was "morally right" to have a child because chances were very good that they would lead a life of even less suffering than their parents. I chose not to have kids because I agree that the world is headed in a bad direction, but more so because of my financial situation as a working class person, and my mental health as a result of a decade working check to check. If I were in the situation my parents were when I was born, I truly think the equation would work out differently.