In a moment of unusual candor, Reagan’s own chairman of the Council of Economic Advisers, Martin Feldstein, gave three reasons for the growth of the deficit: the president’s tax cuts, the increased defense spending and the interest on the expanding national debt.

These were the self-proclaimed fiscal conservatives who were behaving so profligately. The budget was balanced and a surplus realized under Bill Clinton, but soon the “fiscal conservatives” were back in the driver’s seat. “Deficits don’t matter,” said Dick Cheney, and the wildest, most reckless of economic rides was on.

Americans, including the Joe Sixpacks, soccer moms and hockey moms, were repeatedly told that the benefits lavished on the highfliers would trickle down to them. Someday.

Just as they were wrong about trickle down, conservative Republican politicians and their closest buddies in the commentariat have been wrong on one important national issue after another, from Social Security (conservatives opposed it from the start and have been trying to undermine it ever since) to Medicare (Ronald Reagan saw it as the first wave of socialism) to the environment, energy policy and global warming.

When the Nobel Prize in Chemistry was awarded to the discoverers of the link between chlorofluorocarbons and ozone depletion, Tom DeLay, a Republican who would go on to wield enormous power as majority leader in the House, mocked the award as the “Nobel Appeasement Prize.”

Mr. Reagan, the ultimate political hero of so many Republicans, opposed the Civil Rights Act of 1964 and the Voting Rights Act of 1965. In response to the historic Brown v. Board of Education school-desegregation ruling, William F. Buckley, the ultimate intellectual hero of so many Republicans, asserted that whites, being superior, were well within their rights to discriminate against blacks.

“The White community is so entitled,” he wrote, “because, for the time being, it is the advanced race...” He would later repudiate that sentiment, but only after it was clear that his racist view was harmful to himself.

The G.O.P. has done a great job masking the terrible consequences of much that it has stood for over the decades. Now the mask has slipped. As we survey the wreckage of the American economy and the real-life suffering associated with the financial crackup of 2008, it would be well for voters to draw upon the lessons of history and think more seriously about the consequences of the ballots they may cast in the future.