Ever since A.D. 400, when invaders rampaged through Rome and the Roman Empire began to crumble, Europe had become increasingly violent, ignorant, and divided. While Muslims studied the words of the ancient Greeks, most Europeans turned to counting on their hands, and only a few knew how to read.
–Sugar Changed the World,
Marc Aronson and Marina Budhos
What is the connotation of the word rampaged?
What is the overall tone of the passage?