The root problem is that this number of people is considerable relative to the productive potential of Earth-based resources. Possible solutions include raisin

The root problem is that this number of people is considerable relative to the productive potential of Earth-based resources. Possible solutions include raising the productive potential of those resources, like the effort described in the article, and acquiring more resources beyond Earth. Neither of those two requires reducing the human population. So I think you're being inexplicably hasty in offering a drastic anti life solution.