Overpopulation is not the problem, it's the source of energy that is the problem. The irony is that to put the source of energy that really needs to be used to real use, we need as much population as possible to use as much of it as possible.
The problem we have with that is profit. Profit is the energy con tying us into extracted energy. Find a way to stop doing that, then we start using the energy that should be being used, instead of it just becoming heat. Of course I mean solar. Again the irony is that use of solar has to eliminate profit.
I explain a lot more in my own stories, I am a long practicing Systems Engineer, working on this a long time, it's worth reading up on.
BTW, far as I can see, Occam's razor is a profit driven instrument.