Macduff
is primarily motivated by his love for his country. Macduff wen to England to
gather ally with the King of England and Malcolm (Duncan's son) in overthrowing
Macbeth even if this meant that his family will be killed by Macbeth.
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They seized existing trading posts using force.
diseases from Europe such as influenza an small pox
the refusal of the Incan emperor to cooperate with the Spanish
hope this helps!!
Money is the sole motivator for workers...