The decision by the Federal Reserve to loan insurance giant AIG $85 billion in return for as much as 80% ownership of the company is by any measure dramatic. The takeover early last week of Fannie Mae and Freddie Mac represented the culmination of years of intermingling of public and private interests. But the AIG move is de facto a government nationalization of an ailing private company, which, if not unprecedented, has rarely happened in the United States. Even if the intervention was imperative, its scope is startling.

The crisis on Wall Street has, of course, become a political football. Cries of "moral hazard" and "socialism" on one side are drowned out by charges that the current mess is the result of deregulation, and too cozy a relationship between "Wall Street fat cats" and the current administration in Washington. If only reality were that simple. The blame game will continue, but it won't do much to fix what's broken.

Let's get a few canards out of the way: First, yes, stupidity and cupidity and complacency and hubris are involved, and yes, there is gambling in Casablanca. Second, the idea that there is this thing called "the free market" that governments tame or muck up with regulation is a fiction. Governments create the legal conditions for markets; markets shape what governments can do or are willing to do. Regulation versus free-market is a false dichotomy. Maybe in some theoretical universe, if we could start with a blank slate and construct society anew, it wouldn't be. But we exist in a web of markets and regulations, and the challenge is to respond to problems in such a way so that we decrease the odds of future crises.

And that is where AIG becomes instructive. Even good regulations can't prevent all future crises, especially ones that are the result of new technologies and changes that result from them. The capital flows, derivatives contracts and nearly frictionless interlinking of global markets today are the direct result of the information technologies of the 1990s. The implications weren't known until very recently, so it would have been nearly impossible for regulations to have prevented what is happening. But if good regulation can't prevent crises, bad regulations can cause them.

The current meltdown isn't the result of too much regulation or too little. The root cause is bad regulation.