Answer: how did southern leaders justify secession? They argued that since each state had voluntarily joined the union, it had the right to leave the union. ... The North experienced more immigration than the South. Southerners invested in slavery while Northerners invested in industry.
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George Washington
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Here’s the answer :
Following a failed invasion of Iraq in 686, Abd al-Malik focused on securing Syria before making further attempts to conquer the greater part of the Caliphate from his principal rival, the Mecca-based caliph Abd Allah ibn al-Zubayr.
It could mean many different things.
Explanation:
I think it means that without a check on that power it can't be trusted because powers are often abused.
They didn't know that the world was round, at least some of them. The majority of people believed that the world was flat and that you could fall right off the edge.