1. The founding fathers 1775-1800
2. The federal government 1775-1800
3. The federal government 1800-1825
4. The federal government 1825-1850
5. The federal government 1850-1875
6. The federal government 1875-1900
7. The federal government 1900-1925
8. The federal government 1925-1950
9. The federal government 1950-1975.