 In Book VI he describes the Roman Constitution and outlines the powers of the consuls, Senate and People.He concludes that the success of the Roman state was based on their mixed constitution, which combined elements of a democracy, aristocracy, and monarchy.The remainder of the "Histories" discusses the period in which Rome came to dominate the Mediterranean, from the defeat of Hannibal in 201 BC to the destruction of Carthage and the Greek city-state of Corinth in 146 BC.