Niccolò Machiavelli,
The Annotated Prince — Chapter II: Of Hereditary Princedoms
(1513)
“ I say, then, that hereditary States, accustomed to the family of their Prince, are maintained with far less difficulty than new States, since all that is required is that the Prince shall not depart from the usages of his ancestors, trusting for the rest to deal with events as they arise. So that if an hereditary Prince be of average address, he will always maintain himself in his Princedom, unless deprived of it by some extraordinary and irresistible force ”
