>The only reason life expediencies appear lower than 50 (all the way down to the 30s) in places and in eras is due to insane infant mortality driving the number

>The only reason life expediencies appear lower than 50 (all the way down to the 30s) in places and in eras is due to insane infant mortality driving the numbers down. Violence (leading to either immediate death, or due to infection) and epidemics (e.g. HIV) are also very significant factors.