Complex sentence: She views the U.S. as a democratic country, where anyone should come through the schools with a background knowledge of what happened to make the Declaration and the Constitution, and the impacts on their use by the Civil War and the following 19th Century political changes.
Split into simpler sentences: She views the U.S. as a democratic country, where anyone should come through the schools with a background knowledge of what happened to make the Declaration and the Constitution. Two major eras that impact their use were the Civil War and the following 19th Century political changes.