The ideals of the Roman Republic inspired the writers of the American Constitution.
They got ideas from the Roman Republic and their own brains.
It relates to the Constitution because the founders used the Roman government as in inspiration for the Constitution. They had civic virtue, so the founders believed civic virtue was important in order to have a republic.
all people are equal in the eyes of the law
mark antony
Cicero
They both were written to protect people's rights.
Cicero
Roman Catholicism. After the Reform Wars (1857-1861) the constitution was changed again to favor a secular state, which has endured to this date.
In Rome there was an obvious divide between the rich and poor, and they were represented by difference branches of government. In the US, the constitution states that everyone is equal before the law regardless of wealth. The Roman constitution had three branches: the legislative (based on the Athens democracy), the executive (based on the Spartan oligarchy) and the judidical (based on the previous monarchy) and the US constitution was a vast improvement on this.
The only principle which has been incorporated into the US constitution is the power to veto.
the separation of powers.