Why would some states have had a problem with federal government taking on state debts? Which states do you think would have had the biggest issue with that? Why?

The middle east is the best association with which international traded product

What from the columbian exchange had perhaps the biggest impact on the world?

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?