Pangea

I think that if all the continents were smashed back together into a modern Pangea, a lot of things will be different. There would be a lot of people speaking different languages all around the world. Tourism would be a lot less expensive because if all of the continents were back together, then you dont neccisarily have to be on a plane to get anywhere, or a boat. You could travel by car or foot. Since all of the money systems are different, it would be very confusing to have people from Japan trying to buy things in the US.

Picture from here