Abe most likely said that, because if he said slavery was wrong at the time people would disagree and go against him which is very sad but true.
overcrowding, poor sanitation, spread of diseases, and pollution
There were three principles created by Chief Justice John Marshall
1: the constitutional is the supreme law of the land
2: the court has the power to rule that a law is unconstitutional
3: in the event of a conflict between laws, the constitution MUST be followed.
He broadened the authority of papacy.
