[Neoliberalnot]

So are you suggesting global warming? I would guess an extended drought may have been involved.

I thought real climate change was restricted to Al Gore's campaign. Sarc

[Pelham]

It was the beginning of "the Little Ice Age". It was marked by crop failure, famine, and violent storms. There likely was another such event in the 300s that prompted great migrations and helped disrupt the Roman empire in the west.