But just picking winners and losers is hardly sufficient for a president who sees himself as world-historical. Hence the carbon cap-and-trade system he proposed Tuesday night that will massively restructure American industry and create a highly regulated energy sector.

These revolutions in health care, education and energy are not just abstract hopes. They have already taken life in Obama's massive $787 billion stimulus package, a huge expansion of social spending constituting a down payment on Obama's plan for remaking the American social contract.

Obama sees the current economic crisis as an opportunity. He has said so openly. And now we know what opportunity he wants to seize. Just as the Depression created the political and psychological conditions for Franklin Roosevelt's transformation of America from laissez-faireism to the beginnings of the welfare state, the current crisis gives Obama the political space to move the still (relatively) modest American welfare state toward European-style social democracy.

In the European Union, government spending has declined slightly, from 48 percent to 47 percent of GDP during the last 10 years. In the U.S., it has shot up from 34 percent to 40 percent. Part of this explosive growth in U.S. government spending reflects the emergency private-sector interventions of a Republican administration. But the clear intent was to make the massive intrusion into the private sector temporary and to retreat as quickly as possible. Obama has radically different ambitions.

The spread between Europe and America in government-controlled GDP has already shrunk from 14 percent to 7 percent. Two terms of Obamaism and the difference will be zero.

Conservatives take a dim view of the regulation-bound, economically sclerotic, socially stagnant, nanny state that is the European Union. Nonetheless, Obama is ascendant and has the personal mandate to take the country where he wishes. He has laid out boldly the Brussels-bound path he wants to take.

Let the debate begin.