How does a nation literacy rate connect to life expectancy?

Answer 1

Low literacy rates are signs of bad education, and this means that the citizens of that country with low literacy have not received basic education. Uneducated people generally die earlier than educated people.

This may seem like a farfetched assertion, but studies on life expectancy and mortality rates have shown that an increase in education directly corresponds to a decrease in death. The nation's population usually becomes more sustainable as well, since there are less births.

Increased literacy rates = increased life expectancy.

Answer 2

Countries with low literacy are generally less educated.

Less educated countries generally have worse healthcare.

Threfore, countries with low literacy rates can not take care of their citizens as well as educated countries so the life expectancies in these countries are low.