The federalist are basically what it sounds like. They supported the idea of a large federal government with power.
Well fossil fuels are such a largely used resource in the economy it is hard to transition from it since its so depended on for many things.
Answer:
Both the Roman and Han economies were in large part based on agriculture. Sea trade was less expensive than land trade and the fact that Rome was more of a naval empire than the Han Dynasty meant that commerce played a greater role in the Roman economy.