<span><span>Historians rely upon these sources to get the perspectives of people who participated in historical events.
</span><span>Primary sources help historians and students relate to events of the past.
</span><span>These sources help students develop the skills, knowledge, and critical thinking needed to interpret them.</span></span>
Another effect of the spread of Islam was an increase in trade. Unlike early Christianity, Muslims were not reluctant to engage in trade and profit; Muhammad himself was a merchant. As new areas were drawn into the orbit of Islamic civilization, the new religion provided merchants with a safe context for trade.
<span>The economies of Georgia and South Carolina boomed in the 1790's as a result of the manufacture of cotton. With the cotton gin invented by Eli Whitney US production of cotton soared and the majority of that production was in Georgia and South Carolina, improving the economies of both states as a result.</span>
Territorial Acquisition—this term simply means land that taken over by a country.
