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by yummyfajitas 5152 days ago
Not just cultural differences. Things like car accidents and murders also play a disproportionate role.

If nation A has 60 people living to 79, and nation B has 59 people living to 80 and 1 person being murdered at 20, A and B have the same mean life expectancy (of 79).

Though I suppose you could call things like murders and road safety "cultural".