All that stuff you buy comes from somewhere and is made by someone. A blog post over at Crooked Timber - which you should be reading* - discusses this problem taking this series of photographs from a Chinese sweatshop as its starting point. It nicely connects the dots between Adam Smith's invisible hands and Karl Marx's commodity fetishism, using the metaphor of invisible hands.
* [Edit: Holy dangling modifier, Batman! I meant the blog, not the blog post. Although you should read the blog post as well.]