Slaves in Rome might include prisoners of war, sailors captured and sold by pirates, or slaves bought outside Roman territory. In hard times, it was not uncommon for desperate Roman citizens to raise money by selling their children into slavery.
...the human desire to seek adventure.
Answer:
The federal elimination of the Tariff of 1828 and a gradual reduction on import taxes over a decade.
The Dred Scott decision<span> served as an eye-opener to Northerners who ... to regulate</span>slavery<span> in </span>new territories<span>, these once-skeptics reasoned, ... to the reality instead, that the </span>Supreme Court has made<span> Illinois a </span>slave<span> State. ... </span>did<span> not stop </span>slavery<span> now, they might never again </span>have<span> the chance. </span>