From above article.
Sharma: "We knew about the shorter cycles of solar activity, so maybe these are just little cycles within a larger cycle. Even more surprising is the fact that the glacial and interglacial periods on earth during the last 200,000 years appear to be strongly linked to solar activity."
One thing is certain: Severe, global ice age would be more devastating to humans than global warming.
Otherwise the last ice age would never have ended.