People in the Paleolithic age could not trade because they didn't have any resources to create things they could trade or give.People in the Paleolithic age did not have that much resources.
Do you have anything we can trade?
No sorry, there is nothing we can trade.
These changes were very important because if this did not change people would not be able to trade anything for other things they needed instead of what they already had enough of and have what they need. those who can not hunt gather those who can't gather teach.
People in the neolithic age could trade easily with other people.This was easier for them because they could have all of the things they could need.