Past Food Production Evaluation

In my project, the food production system I'm focusing on that of the Ancient Romans. I'm trying to evaluate

• The needs, values, and perspectives that drove them to use this food system
• What processes were used to develop and implement this food system?
• What were the impacts of this food system on humans and this environment as a whole?
• Was this food production system sustainable, why or why not?

I'm starting with Ancient Roman agriculture.