What led to the many civil wars in Rome?

The thing that led to many civil wars in Rome was because of land expansion. Rome was building up their empire by expanding the empire and getting more land, but it was not so easy to get land because there were already other Empire's that had it. In order for Rome to claim more land and expand their empire, they had to go into war for the land. For example, Rome went into what is called the "Punic Wars" against the Carthage Empire for land, and Rome won the wars. Another war was against each other, the cause of the civil war against Romans was because of power, and Romans wanted power over each other so they could have the land that they fought for.