[whimsicalism]

The fall of the government in Kabul. I'm not saying this is the single causal event, but lower than 10% voting definitely contributed to a lack of legitimacy of the central govt leading to its fall.

[themitigating]

Do you proof that it was a cause?

Counter is that participation in European country elections is also low, though probably higher than 10 percent, but that didn't cause them to fall

[whimsicalism]

Where in Europe is election participation even close to that low?