Why did lincoln want to keep maryland in the union?

The most important reason that President Lincoln did not want Maryland to secede from the Union had to do with the location of Washington, D.C.  Maryland lies to the north of Washington.  This meant that, if Maryland were to secede, the capitol of the United States would have been cut off from any contact with the US and would surely have fallen to the Confederates.

Social darwinism refers to the the theory that people who succeed in our economic system will one day out compete those who fail. one day the rich will out succeed the poor so we'll that there will eventually be no more poor