the answer is, the earth is the centre of the universe.
It is the Free Labor System
The answer is: effective secondary source document"
Within 20 years, historians would have enough time to gather all facts and data from all sides that involved in historical event. All of these facts and data is useful for them to decipher how the historical events were unfolded.
This make the chart an effective source to find for information regarding the event. But, since it does not made by people who actually involved in the events, it could only be considered as a secondary source.
Radical Republicans wanted to punish the South for starting the war. They also wanted to be sure new governments in the southern states would support the Republican Party. I'm Frank Oliver. Today, Doug Johnson and I tell about this reconstruction.
The author of Uncle Tom's Cabin is Harriet Beecher Stowe.