What have you learned about the city-states in Greece that you can apply to creating contact between your band of survivors and other survivor groups? Does a city-state work for your group or do you want to form another form of government?
As your survivor group grows, you discover that your survivor band is divided over religion. You have a majority of one religion and a minority of the other. Historically, what can you tell your group about having a split populace with regard to religion? The people seek answers and inner peace. What advice can you give them based upon history?
As your survivor band seeks to expand, how can you use the lessons from the Roman Empire to know when to expand, how to expand, and the pitfalls of expansion?