Three months into his presidency, Barack Obama has proven to be every bit as charismatic and intelligent as his most ardent supporters could have hoped. At home or abroad, he invariably appears to be the only adult in the room, the first American president in at least forty years to convey any gravitas. Even the most liberal of voters are finding it hard to believe they managed to elect this man to be their president.

It is impossible not to wish desperately for his success as he tries to grapple with all that confronts him: a worldwide depression, catastrophic climate change, an unjust and inadequate health-care system, wars in Afghanistan and Iraq, the ongoing disgrace of Guantánamo, a floundering education system.

Obama’s failure would be unthinkable. And yet the best indications now are that he will fail, because he will be unable—indeed he will refuse—to seize the radical moment at hand.

Every instinct the president has honed, every voice he hears in Washington, every inclination of our political culture urges incrementalism, urges deliberation, if any significant change is to be brought about. The trouble is that we are at one of those rare moments in history when the radical becomes pragmatic, when deliberation and compromise foster disaster. The question is not what can be done but what must be done.

We have confronted such emergencies only a few times before in the history of the Republic: during the secession crisis of 1860–61, at the start of World War II, at the outset of the Cold War and the nuclear age. Probably the moment most comparable to the present was the start of the Great Depression, and for the scope and the quantity of the problems he is facing, Obama has frequently been compared with Franklin Roosevelt. So far, though, he most resembles the other president who had to confront that crisis, Herbert Hoover.

The comparison is not meant to be flippant. It has nothing to do with the received image of Hoover, the dour, round-collared, gerbil-cheeked technocrat who looked on with indifference while the country went to pieces. To understand how dire our situation is now it is necessary to remember that when he was elected president in 1928, Herbert Hoover was widely considered the most capable public figure in the country. Hoover—like Obama—was almost certainly someone gifted with more intelligence, a better education, and a greater range of life experience than FDR. And Hoover, through the first three years of the Depression, was also the man who comprehended better than anyone else what was happening and what needed to be done. And yet he failed.