Will end the current age of civilization? Most definitely.

Will it end organized societies as we know them? Probably?

Will the human beings go extinct? Probably not. Its not crazy to think that we’d face a bottleneck of only a few hundred million humans or less. But there are people all across the economic and geographic spectrum who are prepping. The rich will survive at their polar fortresses. The poorer will survive underground, or at high altitudes.