There may be further asked the question why did not Africa rise as did the other peoples and make her exploitation impossible. We are forced to turn from social to natural factors. The geography of Europe is quite different from that of Africa. When wave after wave of migrants left the Iranian plains and turned west and east and south, it is clear that those who turned into Africa had an endless journey before them ere they had to the margin come. Of great mountain ranges there were none. On the monotonous plains of Africa the cultural extensions must have been horizontal. The races that went into Europe were more quickly stayed in their onward march by the coldness of the north. Not only this but they were in the midst of a mountainous country where tribes and peoples could drift into human eddies and there remain out of the current of human activities for ages. Not only might they remain aloof from the busy thoroughfare of migrating myriads but within each eddy there was the possibility of a growth in culture in its simpler aspects. By and by, the culture of one eddy was crossed with the culture of other eddies that had developed in other cultural directions or farther in the same direction. In time there was by reason of the northern limit of Europe a rebound of the population and this was also a rebound of cultures. The various crosses and modification of cultures made it more probable that civilized progress would be accelerated. The culture of Europe was, by reason of the physical geography, a heterogeneous culture, while that of Africa was necessarily homogeneous in view of the geography of that continent. In support of my contention I refer to Ripley who says: "The remarkable prehistoric civilization of Italy is due to the union of cultures, one from Hallstatt region having entered from the west via the Danube, the other coming from the southeast by sea being distinctly Mediterranean. From the fusion of these cultures came the Umbrian and Etruscan civilizations." Ripley further contends that the ancient high civilization of Mesopotamia was possible because it was a point of convergence of immigration and invasion. Civilization has always been accentuated at points where cultures could cross.[25] There are few or none such points in Africa; hence the retardation of cultures there. As Lady Lugard said, the slave trade aggravated the cultural disadvantages which grew out of the physical geography of Africa, and because of its monotony of environment there has been little or no cross fertilization of cultures, the indispensable requisite to cultural development.[26] GORDON BLAINE HANCOCK FOOTNOTES: [1] Frobenius, _The Voice of Africa_, 673. [2] _Baganda, Their Customs and Beliefs_, 10. [3] _Ibid._ [4] Roscoe, _Baganda_, 12. [5] _Ibid._, 120. [6] _Ibid._, 263. [7] _Ibid._, 267. [8] Bent, _Mashonaland_, 22. [9] _Ibid._, 53. [10] Roscoe, _The Baganda_, 79. [11] _Ibid._