The correct answer to this open question is the following.
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The common about European control of Africa I think Joseph Conrad will make in the "Heart of Darkness," is the way the author documents and describes the brutality of European kings to exploit the many raw materials and natural resources of the African continent. In this case, King Leopold of Belgium in Congo, depriving African people of their native lands and making them simple workers laboring for long hours under a very low salary. A true expression of abusive practices of European superpowers during the so-called Scramble for Africa.
Joseph Conrad is the author of "Heart of Darkness" which published in 1899 in "Blackwood's Magazine." He later created a book in 1902.
