Two centuries ago, our forbears would have known the precise history and origin of nearly every one of the limited number of things they ate and owned, as well as of the people and tools involved in their production. ... The range of items available for purchase may have grown exponentially since then. but our understanding of their genesis has diminished almost to the point of obscurity. We are now as imaginatively disconnected from the manufacture and distribution of our goods as we are practically in reach of them, a process of alienation which has stripped us of myriad opportunities for wonder, gratitude and guilt.