Anthony, I'll just add,

If you consider that every fraction of a degree counts at this point, in terms of lives lost to climate disasters, climate-related suffering -- as well as GDP / economic growth -- then a reduction in consumption seems an absolute must as well. A no brainer. We should all be consuming less to slow the pace of emissions, habitat loss, species extinction, etc., for sake of these things and their knock-on effects. If we can stave off major tipping points for a few more years, it may buy us time to put more decarbonization measures in effect, cool the poles, etc. So my personal view is that consumption reduction is one part of an "all hands on deck" approach.

In theory, renewables can support the current human population at our levels of consumption. (I'll try to find the study my friend at the world bank cited -- it was from a Canadian group...)

The problem is getting there, and do we have the time to do a one-for-one swap to renewables while keeping everybody humming along. Probably not.