I think the Personal Liability insurance that almost everyone has in Germany is an overlooked societal lubricant. For €10 a month, you get €10 million in coverage for accidental damage.

* No incentive for revenge law suits.

* Damages are well regulated so you can't sue for €1 million just because someone's bicycle ran over your toe.

* Can't sue for exorbitant medical expenses because in most cases there are no personal medical expenses i.e. covered anyway by govt health insurance.

I'm unsure if personal liability insurance is popular elsewhere in Europe.