Wealthier European countries were able to expand because of the industrial revolution's financial support.
The industrial revolution gave Europe the ability to successfully conquer and profitably sustain so many colonies abroad, which was the driving factor behind this New Imperialism. The industrial revolution forced Europe to take over other lands because it had no other option.
Imperialism is the term for the practice of colonizing non-industrialized regions of the world with powerful armies and navies in order to get access to the raw resources required for their industries.
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