<P> Geoffroy de Saint - Hilaire, director of the Parisian Jardin d'acclimatation, decided in 1877 to organise two "ethnological spectacles", presenting Nubians and Inuit . The public of the Jardin d'acclimatation doubled, with a million paying entrances that year, a huge success for these times . Between 1877 and 1912, approximately thirty "ethnological exhibitions" were presented at the Jardin zoologique d'acclimatation . "Negro villages" would be presented in Paris' 1878 and 1879 World's Fair; the 1900 World's Fair presented the famous diorama "living" in Madagascar, while the Colonial Exhibitions in Marseilles (1906 and 1922) and in Paris (1907 and 1931) would also display human beings in cages, often nudes or quasi-nudes . Nomadic "Senegalese villages" were also created, thus displaying the power of the colonial empire to all the population . </P> <P> In the US, Madison Grant, head of the New York Zoological Society, exposed Pygmy Ota Benga in the Bronx Zoo alongside the apes and others in 1906 . At the behest of Grant, a prominent scientific racist and eugenicist, zoo director Hornaday placed Ota Benga in a cage with an orangutan and labeled him "The Missing Link" in an attempt to illustrate Darwinism, and in particular that Africans like Ota Benga are closer to apes than were Europeans . Other colonial exhibitions included the 1924 British Empire Exhibition and the successful 1931 Paris "Exposition coloniale". </P> <P> From the beginning of the 20th century onward, the elimination or control of disease in tropical countries became a driving force for all colonial powers . The sleeping sickness epidemic in Africa was arrested due to mobile teams systematically screening millions of people at risk . In the 20th century, Africa saw the biggest increase in its population due to lessening of the mortality rate in many countries due to peace, famine relief, medicine, and above all, the end or decline of the slave trade . Africa's population has grown from 120 million in 1900 to over 1 billion today . </P> <P> The continuing anti-slavery movement in Europe became a reason and an excuse for the conquest and colonization of the Africa . It was the central theme of the Brussels Anti-Slavery Conference 1889 - 90 . During the Scramble for Africa, an early but secondary focus of all colonial regimes was the suppression of slavery and the slave trade . In French West Africa, following conquest and abolition by the French, over a million slaves fled from their masters to earlier homes between 1906 and 1911 . In Madagascar, the French abolished slavery in 1896 and approximately 500,000 slaves were freed . Slavery was abolished in the French controlled Sahel by 1911 . Independent nations attempting to westernize or impress Europe sometimes cultivated an image of slavery suppression . In response to European pressure, the Sokoto Caliphate abolished slavery in 1900 and Ethiopia officially abolished slavery in 1932 . Colonial powers were mostly successful in abolishing slavery, though slavery remained active in Africa even though it has gradually moved to a wage economy . Slavery was never fully eradicated in Africa . </P>

Which european country appears to have had the most colonial territory in africa