This one right here, I see this over and over again in western left circles, Engels pwned Malthus in Anti-Dühring, Marx saw its flaws, why can't we? Avoid having kids because you don't want to or can't, not because you're afraid of the future. Yes, with climate change is going to be ugly, but if we give up and collectively die how can we fight against it? Life is full of unknowns.