(The following column by George Soros first appeared in the New York Review of Books and on Reuters.com. The opinions expressed are his own)

By George Soros

REUTERS – The euro crisis is a direct consequence of the crash of 2008. When Lehman Brothers failed, the entire financial system started to collapse and had to be put on artificial life support. This took the form of substituting the sovereign credit of governments for the bank and other credit that had collapsed. At a memorable meeting of European finance ministers in November 2008, they guaranteed that no other financial institutions that are important to the workings of the financial system would be allowed to fail, and their example was followed by the United States.

Angela Merkel then declared that the guarantee should be exercised by each European state individually, not by the European Union or the eurozone acting as a whole. This sowed the seeds of the euro crisis because it revealed and activated a hidden weakness in the construction of the euro: the lack of a common treasury. The crisis itself erupted more than a year later, in 2010.

There is some similarity between the euro crisis and the subprime crisis that caused the crash of 2008. In each case a supposedly riskless asset – collateralized debt obligations (CDOs), based largely on mortgages, in 2008, and European government bonds now – lost some or all of their value.

Unfortunately the euro crisis is more intractable. In 2008 the US financial authorities that were needed to respond to the crisis were in place; at present in the eurozone one of these authorities, the common treasury, has yet to be brought into existence. This requires a political process involving a number of sovereign states. That is what has made the problem so severe. The political will to create a common European treasury was absent in the first place; and since the time when the euro was created the political cohesion of the European Union has greatly deteriorated. As a result there is no clearly visible solution to the euro crisis. In its absence the authorities have been trying to buy time.

In an ordinary financial crisis this tactic works: with the passage of time the panic subsides and confidence returns. But in this case time has been working against the authorities. Since the political will is missing, the problems continue to grow larger while the politics are also becoming more poisonous.

It takes a crisis to make the politically impossible possible. Under the pressure of a financial crisis the authorities take whatever steps are necessary to hold the system together, but they only do the minimum and that is soon perceived by the financial markets as inadequate. That is how one crisis leads to another. So Europe is condemned to a seemingly unending series of crises. Measures that would have worked if they had they been adopted earlier turn out to be inadequate by the time they become politically possible. This is the key to understanding the euro crisis.

Where are we now in this process? The outlines of the missing ingredient, namely a common treasury, are beginning to emerge. They are to be found in the European Financial Stability Facility (EFSF)-agreed on by twenty-seven member states of the EU in May 2010-and its successor, after 2013, the European Stability Mechanism (ESM). But the EFSF is not adequately capitalized and its functions are not adequately defined. It is supposed to provide a safety net for the eurozone as a whole, but in practice it has been tailored to finance the rescue packages for three small countries: Greece, Portugal, and Ireland; it is not large enough to support bigger countries like Spain or Italy. Nor was it originally meant to deal with the problems of the banking system, although its scope has subsequently been extended to include banks as well as sovereign states. Its biggest shortcoming is that it is purely a fund-raising mechanism; the authority to spend the money is left with the governments of the member countries. This renders the EFSF useless in responding to a crisis; it has to await instructions from the member countries.

The situation has been further aggravated by the recent decision of the German Constitutional Court. While the court found that the EFSF is constitutional, it prohibited any future guarantees benefiting additional states without the prior approval of the budget committee of the Bundestag. This will greatly constrain the discretionary powers of the German government in confronting future crises.

The seeds of the next crisis have already been sown by the way the authorities responded to the last crisis. They accepted the principle that countries receiving assistance should not have to pay punitive interest rates and they set up the EFSF as a fund-raising mechanism for this purpose. Had this principle been accepted in the first place, the Greek crisis would not have grown so severe. As it is, the contagion-in the form of increasing inability to pay sovereign and other debt-has spread to Spain and Italy, but those countries are not allowed to borrow at the lower, concessional rates extended to Greece. This has set them on a course that will eventually land them in the same predicament as Greece. In the case of Greece, the debt burden has clearly become unsustainable. Bondholders have been offered a "voluntary" restructuring by which they would accept lower interest rates and delayed or decreased repayments; but no other arrangements have been made for a possible default or for defection from the eurozone.

These two deficiencies – no concessional rates for Italy or Spain and no preparation for a possible default and defection from the eurozone by Greece – have cast a heavy shadow of doubt both on the government bonds of other deficit countries and on the banking system of the eurozone, which is loaded with those bonds. As a stopgap measure the European Central Bank (ECB) stepped into the breach by buying Spanish and Italian bonds in the market. But that is not a viable solution. The ECB had done the same thing for Greece, but that did not stop the Greek debt from becoming unsustainable. If Italy, with its debt at 108 percent of GDP and growth of less than 1 percent, had to pay risk premiums of 3 percent or more to borrow money, its debt would also become unsustainable.

The ECB's earlier decision to buy Greek bonds had been highly controversial; Axel Weber, the ECB's German board member, resigned from the board in protest. The intervention did blur the line between monetary and fiscal policy, but a central bank is supposed to do whatever is necessary to preserve the financial system. That is particularly true in the absence of a fiscal authority. Subsequently, the controversy led the ECB to adamantly oppose a restructuring of Greek debt-by which, among other measures, the time for repayment would be extended-turning the ECB from a savior of the system into an obstructionist force. The ECB has prevailed: the EFSF took over the risk of possible insolvency of the Greek bonds from the ECB.