UK establishes national slavery memorial day
Slavery is the first phase of colonialism and, although already present in earlier times, it achieves the greatest development during colonialism.
Estimates of the number of people enslaved in the course of centuries vary widely, but for Africa alone are between ten and one hundred million people (Joseph Ki-Zerbo (1977) History of Black Africa, Torino, Einaudi, p. 274).
Only in the nineteenth century, under the boost of the movement for the abolitionism, it will progressively be abolished.
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