Although all three have been criticised, especially based on their more centralised style of rule, they issued reforms that created a stable enough empire to last well into the 3rd century.
Walapun ketiganya dikritik terutama berdasarkan pada gaya pemusatan pemerintahan mereka, mereka mengeluarkan reformasi yang cukup stabil yang membuat kekaisaran berlangsung baik selama tiga abad.