What was Lincoln's "master stroke" that followed his emancipation proclamation

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes

the main objectives of the progressive movement were eliminating problems caused by industrialization, urbanization, immigration, and political corruption.

to replace ineffective because   andrew jackson's spoil system was a deliberate policy after he became president to remove federal employees he considered to be political opponents and replace them with his own supporters.