It's likely that the sun will be the driver for all of it. We'll need a few thousand more years to be sure. ;)
Considering what the geology shows, this certainly makes more sense than the contention that CO2 is causing global warming. If that were the case, the CO2 / temperature change correlations seen in the geologic record (during times when mankind was numbered in the hundreds of thousands and living in caves and the trees) would make no sense at all. It does seem more logical and better supported by long term geologic evidence that warming (and cooling) cycles affect CO2 concentrations, not the reverse.
With their arguments more and more refuted by factual data and logic, it will be interesting to see how long the pinheads in the environmental movement can hold out.