[OscarCunningham]

For a cause of death affecting 40000/2700000 it could only reduce life expectancy from 79 to 77.8, even if all the victims were age 0.

EDIT: I suppose it could be lowered a bit more if all those who died were those who would otherwise have lived longest.

[bpicolo]

> I suppose it could be lowered a bit more if all those who died were those who would otherwise have lived longest.

That would average out in a population size of 40k

[OscarCunningham]

No, I mean there could be some actual effect that selected for those people.

For example if rich people were culturally more likely to use heroin than poor people, then overdoses would lower the life expectancy more than you would expect, because rich people (when not overdosing on heroin) have better access to medical care and hence longer life expectancy.