Roman Architecture was a factor that contributed to the Roman's powerful rise. Architecture such as Roads and aqueducts means faster trade and brings more water to support more people.
The most important reason for the Roman's powerful rise is their win in battles. They won against their strongest enemy Carthage after enduring many loses because they were willing to adapt and try new strategies.
Another factor that supports Roman's rise is their army. They had plenty of soldiers and fought in a formation called Legion so they never got tired and fought form long periods of time.
Laws seemed the least important to Rome's rise in power because most of their laws were unreasonable and didn't affect gaining power the laws affected day to day life.
Table I.1.If anyone summons a man before the magistrate, he must go. If the man summoned does not go, let the one summoning him call the bystanders to witness and then take him by force.2.If he shirks or runs away, let the summoner lay hands on him.3. If illness or old age is the hindrance, let the summoner provide a team. He need not provide a covered carriage with a pallet unless he chooses.