There were multiple things that went wrong, and it's extremely disingenuous to put the majority of the blame on Greenspan, Freddie/Fannie. Private risk assessme

There were multiple things that went wrong, and it's extremely disingenuous to put the majority of the blame on Greenspan, Freddie/Fannie. Private risk assessment failed utterly, see Moody's. CDS allowed for infinite leverage, securitization allowed hiding of risk. These originated with private actors, and infected the system with toxic assets.