A civilization that uses storage to level that intermittency. It's perfectly possible to power industrial world civilization using only renewables, and it would be cheaper than trying to do it with fission (which would require breeder reactors, btw.)
No, it’s not and you have no clue what you are talking about.
There is a reason even Germany is still heavily dependent on coal despite investing hundreds of billions into renewables
It simply does not work without dispatchable energy sources.