First world population 150 years ago was less than 1/3 what it is now.   Farms today put out enough food to feed 2x the current world population.  150 years ago food production was sufficient to keep about 110% of the world population fed.   The reality is though we went from 90% of the worlds population producing food to 2% of the worlds population producing food.   Without fossil fuels that is impossible to achieve with current or 30 year foreseeable technologies.  So yes MILLIONS of people would die (if your plan were fully implemented) or revolt (to keep the status quo).   

And no Bob the only one promoting destroying the ship are the folks like yourself.   Get off your arrogant high horse and join everyone else here in a place called reality.