History of the Constitution of the Roman Republic
The history of the Constitution of the Roman Republic is a study of the ancient Roman Republic that traces the progression of Roman political development from the founding of the Roman Republic in 509 BC until the founding of the Roman Empire in 27 BC. The constitutional history of the Roman Republic can be divided into five phases. The first phase began with the revolution which overthrew the Roman Kingdom in 509 BC, and the final phase ended with the revolution which overthrew the Roman Republic, and thus created the Roman Empire, in 27 BC. Throughout the history of the republic, the constitutional evolution was driven by the struggle between the aristocracy and the ordinary citizens.
Roman Republic
Unlike the "Pax Romana" of the Roman Empire, the Republic was in a state of quasi-perpetual war throughout its existence. Its first enemies were its Latin and Etruscan neighbours as well as the Gauls, who even sacked the city in 387 BC. The Republic nonetheless demonstrated extreme resilience and always managed to overcome its losses, however catastrophic. After the Gallic Sack, Rome indeed conquered the whole Italian peninsula in a century, which turned the Republic into a major power in the Mediterranean. The Republic's greatest enemy was doubtless Carthage, against which it waged three wars. The Punic general Hannibal famously invaded Italy by crossing the Alps and inflicted on Rome two devastating defeats at the Lake Trasimene and Cannae, but the Republic once again recovered and won the war thanks to Scipio Africanus at the Battle of Zama in 202 BC. With Carthage defeated, Rome became the dominant power of the ancient Mediterranean world. It then embarked in a long series of difficult conquests, after having notably defeated Philip V and Perseus of Macedon, Antiochus III of the Seleucid Empire, the Lusitanian Viriathis, the Numidian Jugurtha, the great Pontic king Mithridates VI, the Gaul Vercingetorix, and the Egyptian queen Cleopatra.