Group+4

Inventions (1- 4 )

Monopolies(1-4)

Robber Barons and Captains of Industry (1-4)

Immigration(1-4)

Strikes(1-4)

Urban Renewal(1-4)

Political Machines(1-4)

Progressives and Muckrakers(1-4)

1912 Presidential Election(1-4)