The ancient Maya civilization was formed by members of this group, and today's Maya are generally descended from people who lived within that historical civilization. Today they inhabit southern Mexico, Guatemala, Belize, El Salvador and Honduras.
I think it’s the first one.
Southern Secession is the event or issue that historians can gain.
Agricultural has changed social classes. For, example, trash has affected the upper class because of the amount of it keeps increasing, this also increases the difference between the high and low class.