There has always been slavery inside Africa.
(Sadly slavery is still in Africa today.)
Europeans sold goods that the kingdoms wanted.
The kingdoms kept pushing further and further into the interior.
This created a continuous cycle.
Whites were sold into slavery in Africa also.
(They were captured from barbery pirates in North Africa.)
It applies to the religious and artistic aspect of culture
Both the reformation and rennaissance that followed the Dark ages or the Medieval ages both had a positive consequence for cultural change in terms of the culture we're witnessing and experiencing today. Both movements brought about different ways of thinking which have substantially revitalized the way the world was viewed at the time.
The buildup of a country's military and weaponry is an arms race.
No because they took land from the Natives without asking the Natives