Which western river were important for trasporting goods. loisianana purchase

The Mississippi River was a highway that hundreds of settlers used to transport people, products, and goods. Even the merchants who used the river were not worried about the land on the other side of the river. In the beginning Spain owned the property west of the Mississippi.

a big wall across the mexican border so no drugs, terrorist, or illegal immigrants can come through : )    

john maynrd keynes developed new economic respose to the                           ( b. great depression if the 1930's)