Which idea was supported by both Plato and Aristotle?

Answer

The idea supported by both Plato and Aristotle is that an ideal form of government is possible. While they differed on what this ideal government looked like ( Plato favored a philosopher-king, and Aristotle favored a mixed constitution or polity), both philosophers believed that it was possible to achieve a well-ordered and just society through the right governmental structure. They both engaged in philosophical and political analyses to determine the best form of government for a flourishing society.