"The question about human overpopulation is not whether there can be overpopulation, but whether the often popular claim that the earth can not sustain the current or the projected future human population is true"

So only human overpopulation is impossible, you're saying. I think you're wrong on that. We're special relative to other species -- but not that special, and not immune to it.

"In the grand scheme of things, we - humanity - know mostly how to create a sustainable technological system that can support 10B population. Whether our politics will allow us to get to such a system is a entirely different problem, and THAT might be our undoing, but I'd argue that's not really an overpopulation problem."

Is the goal to pack as many humans onto this planet as is possible?? That certainly isn't my goal, at all. With our technology, we don't need vast numbers with which to build pyramids or plant fields.