the building of the railroad. we are in the great hall of the california state railroad museum. this explores the idea of community development. in the 1860's, california might well have been hawaii, as far as the rest of the united states was concerned. west of the river, was just miles of nothing. culturally, for the united states, it was a vast, unknown quantity. and several hundred miles down of california there was a 12 month growing season and a land of prosperity. it was important for the country, during the civil war, to have a collection with california. -- connection with california. suddenly, instead of a four-month journey back to united states, you could come back in 10 days. that meant suddenly california is blessed with a 430 mile long central valley with some of the richest growing soil in the world. and suddenly you had a reason for agriculture, fruit and wheat to be grown and now you have markets for it to be sold in. you can connect with the valuable markets of asia for different food items. suddenly, the united states goes from being a nation of the north amer