What were the social and/or psychological effects of WWI on Europe and the world?

European expansion into africa left native regimes intact but had a strong impact on local societies what does this mean

What does the quote describe? “the closeness of the place, and the heat of the climate, added to the number in the ship, which was so crowded that each had scarcely room to turn himself, almost suffocated us….the shrieks of the women, and the groans of the dying, rendered the whole a scene of horror almost inconceivable.”

What change took place in the african slave trade in the 1500's?