I’ve got a new year’s resolution and a new slogan for the country.

The resolution may be difficult, but it’s essential. Americans must resolve to be smarter going forward than we have been for the past several years.

Look around you. We have behaved in ways that were incredibly, astonishingly and embarrassingly stupid for much too long. We’ve wrecked the economy and mortgaged the future of generations yet unborn. We don’t even know if we’ll have an automobile industry in the coming years. It’s time to stop the self-destruction.

The slogan? “Invest in the U.S.” By that I mean we should stop squandering the nation’s wealth on unnecessary warfare overseas and mindless consumption here at home and start making sensible investments in the well-being of the American people and the long-term health of the economy.

The mind-boggling stupidity that we’ve indulged in was hammered home by a comment almost casually delivered by, of all people, Bernie Madoff, the mild-mannered creator of what appears to have been a nuclear-powered Ponzi scheme. Madoff summed up his activities with devastating simplicity. He is said to have told the F.B.I. that he “paid investors with money that wasn’t there.”