The reason is so the romans whould not kill them
The answer for this might be public executions
Assuming you're referring to Frederick Lucas, he says that the preamble to the Declaration of Independence "sets the tone" for the rest of the document by making it clear why exactly the founders have submitted it.
They feared aristocratic conspiracy
Hypatia is famous for being the greatest mathematician and astronomer of her time, for being the leader of the Neoplatonist school of philosophy in Alexandria, for spectacularly overcoming the profound sexism of her society, and for suffering a violent death at the hands of ignorant zealots.
Hope this helps!