If you were interested in learning about the conditions that conspired to create the great American housing bubble which burst in spectacular fashion in 2008 and brought the entire global financial system to its knees, you might start by reading the history of Fannie and Freddie, or you might take a hard look at Blythe Masters and the wizards who created the credit default swap, or, if you wanted to save yourself quite a bit of time and effort, you could just look at the current market for subprime auto loans.