English parliament accepted abolishing of slave trade on May 09. 1788

The history of western nations is accompanied with the slavery trading and resulting in the big african american population in the north American continent. The long lasting consequence can be seen even today in many aspects in american society. The Britsich parliament only accepted the policy but this was not until 1950s after the World War II, the slavery issue was fully addressed. In America, this was not until Dr. King's famous speech: "I have a dream" changed a lot. For readers who are interested in this chapter of European history, a good article can be found under:

http://www.history.ac.uk/ihr/Focus/Slavery/articles/walvin.html

In a civilized and harmonic world, we need to always remind us of not allowing darkside of human history coming back again.