Why were there no great American empires?

The simple answer is that the Native American population in the Great Plains was proportionally low for the amount of land they resided in.

Explanation:

you will need these

an outline of all three paragraphsan identification of the historical era that you are writing aboutan explanation of the term mass productiona description of two ways new technology affected industrya conclusion that shows how new technologies allowed industrialization to grow

portugal, spain, france, netherlands, and great britain