(words in italics were added to the us constition by the confederates; text in brackets was removed): "we, the people of the [united states] confederated states, each state acting in its sovereign and independent character, in order to form a [more perfect union] permanent federal government, establish justice, insure domestic tranquility [provide for the common defense, promote the general welfare], and secure the blessings of liberty to ourselves and our posterity, invoking the favor and guidance of almighty god, do ordain and establish this constitution for the [united] confederate states of america." read this excerpt from the constitution of the confederate states. on which event or issue can historians gain insight from this excerpt?