J. Hector St. Jean de Crevecoeur's "Letters from an American Farmer"

monarchy

mon·​ar·​chy ˈmä-nər-kē  
 also  -ˌnär-
pluralmonarchies
Noun
1
undivided rule or absolute sovereignty by a single person
Saudi Arabia is governed by a monarchy.
2
a nation or state having a monarchical government
Britain is a monarchy.
3
a government having a hereditary chief of state with life tenure and powers varying from nominal to absolute
The country's hereditary monarchy survived for centuries.

Source