Why would america fight against other cultures?

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.

How do private property rights serve as an incentive in a free enterprise economy ?

In what way did expansion and global trade during the 15th to 18th centuries affect the economies of european countries?