In 1807 the slave trade was abolished in Britain, and in 1834 slavery itself was abolished throughout the British Empire - largely due to the work of William Wilberforce. In 1804 an independent Black African nation was established in Haiti - marking the end of slavery in the West Indies and Africa.
Meet the 14th Century African king who was richest man in the world of all time (adjusted for inflation!)
List of the wealthiest people ever - adjusted for inflation, includes african kings, wealthy normans that helped invade England, John of Gaunt, Bill Gates, Henry Ford, etc... Interesting little list to supplement history lesson