even worse advice in that property rights in most of your goblin lands south of the rio grande are rather arbitrary and every 10 or 15 years some new orc pins a bunch of medals on his chest throws a revolution and nationalizes everything .  this is a large reason why most of south and central america is still stuck in the stone age; nobody with any sense is going to consider long term investment there if it's subject to being lost the next time you animals throw a revolution.
United States