Your phrasing makes it sound as if most people alive have terrible living conditions and high early mortality... Which is incorrect. The misery is pretty local

Your phrasing makes it sound as if most people alive have terrible living conditions and high early mortality... Which is incorrect. The misery is pretty localized in Africa and some places in the middle east, which is less then 20% of the population. Life could be better in a lot of places, but it's incomparably better to life under the churches in the dark ages for example.