Can understanding history prevent potential problems in the future

Most definitely! However, that doesn't mean it will solve problems in the future. Understanding a nations' history of what worked and what did not work is very valuable to solving problems and maitning unity as a nation. Just remember this is a subjective answer. : )

Yes!!

A famous quote is

Those who don't know history, are doomed to repeat it

~Courtney

i think iowa because you committed the crime there

a widespread disease that killed many people

the split of the christian church

invasion from arab muslims