So many comments to this topic of which there is some truth and understanding but even more ignorance.
Africa is a continent of 54 countries, so don't condemn the entire continent.
Slavery was never agood thing for Africa and Africans did take part but that doesn't excuse the role of the Europeans in the mass movements of people for exploitation and brutality on a scale I hope we never see again.
Once salvery was out of fashion due to the reduced value of goods including sugar and cotton, the Europeans turned to the African continent for expliotation. The idiots carved out vast areas of land creating countries with a diversity of cultures and are surprised when they don't get along. How can you expect harmony in a country like Nigeria with over 250 ethnic groups? In fact the Europeans incouraged disunity by favouring one tribe over the others. The old divide and conquer trick you are so proud of.
Poverty in Africa is disappointing but probably no where as bad as you think considering the only information we see about African countries relates to war or aid appeals. Their economies were geared for european consumption and businesses will not commit to producing food that the locals cannot afford so bear that in mind when you consider the availability of affordable products. Going forward African countries are increasing able to take avantage of their vast resources, including oil and land etc so expect much in the way of building infrastructure and investment of health and education.
With regards to the British giving less money to Africa, perhaps it is due to a recognition that their country is going down a hole.