Nuclear annihilation is a much more likely threat to the human race. We just constantly shove it out of our minds because its too damn scary. I know I do. I wou

Nuclear annihilation is a much more likely threat to the human race. We just constantly shove it out of our minds because its too damn scary. I know I do. I wouldn't be able to sleep at night, or focus on my job if I thought about it too much. Climate change is also scary. And could lead to conflicts that cause nuclear exchanges. That's also a more credible threat than falling sperm count. Falling sperm count may be a big concern, but how scary it is really depends on the cause. If falling sperm count just means that our population slowly drops to sustainable levels, levels where just washing clothes made of nylon no longer causes damaging plastic pollution in the arctic, for example, then that might not be the worst outcome (relative to the counterfactual such as population-dependent climate-change-induced nuclear-exchanges over scarce resources). And if plastic pollution is the cause of falling sperm count, it might just be self correcting...