who believed that only philosophers should run the government
Meritocracy Both Plato and Aristotle advocated meritocracy, Plato in his The Republic, arguing that the most wise should rule, and hence the rulers should be philosopher kings.[29]
Separation of powers Aristotle first mentioned the idea of a "mixed government" or hybrid government in his work Politics where he drew upon many of the constitutional forms in the city-states of Ancient Greece. In the Roman Republic, the Roman Senate, Consuls and the Assemblies showed an example of a mixed government according to Polybius (Histories, Book 6, 11â€“13).