Despite great advances in technology and global wealth, many parts of the world --  especially Sub-Saharan Africa -- have been left behind.

Citizens in these countries are generally poor, uneducated, live in dilapidated conditions, and carry out life's most basic tasks without the assistance of modern technology.

Perhaps saddest of all, however, is that their health is also detrimentally affected.  The most telling statistic about this issue is probably their low life expectancy.

According to data compiled by the US Central Intelligence Agency, the tiny European country of Monaco (GDP per capita of $30,000) ranks the highest in this statistic with 89.73 years.

On the other end of the spectrum, some poor countries' life expectancy is about half of Monaco's figure.

Wealth is certainly a big factor; countries ranked low for GDP per capita also ranked low for life expectancy.

Click Start to view the countries with the lowest life expectancy.