The wholesomeness of industrial society during this epoch was captured by the american economist and nobel laureate , paul krugman , in his memorable image of a picket fence .
Originally used to keep livestock out of the garden , picket fences or natural stone walls enclose and define it as a separate outdoor " room " and add to the cozy feel .
It 's a promise I make to my daughters when I tuck them in at night , and a promise that you make to yours - a promise that has led immigrants to cross oceans and pioneers to travel west ; a promise that led workers to picket lines , and women to reach for the ballot .