The Richest Individual in Human History

If you believe Carlos Slim or Bill Gates are the wealthiest individuals who have ever lived in human history then click on the link below (try not to read the whole URL!) to see whether you are correct.

http://www.independent.co.uk/news/world/world-history/meet-mansa-musa-i-of-mali–the-richest-human-being-in-all-history-8213453.html