I had lunch with Howard Zinn just a few weeks ago, and I've seldom had more fun while talking about so many matters that were unreservedly unpleasant: the sorry state of government and politics in the U.S., the tragic futility of our escalation in Afghanistan, the plight of working people in an economy rigged to benefit the rich and powerful.

Mr. Zinn could talk about all of that and more without losing his sense of humor. He was a historian with a big, engaging smile that seemed ever-present. His death this week at the age of 87 was a loss that should have drawn much more attention from a press corps that spends an inordinate amount of its time obsessing idiotically over the likes of Tiger Woods and John Edwards.

Mr. Zinn was chagrined by the present state of affairs, but undaunted. "If there is going to be change, real change," he said, "it will have to work its way from the bottom up, from the people themselves. That's how change happens."

We were in a restaurant at the Warwick Hotel in Manhattan. Also there was Anthony Arnove, who had worked closely with Mr. Zinn in recent years and had collaborated on his last major project, "The People Speak." It's a film in which well-known performers bring to life the inspirational words of everyday citizens whose struggles led to some of the most profound changes in the nation's history. Think of those who joined in - and in many cases became leaders of - the abolitionist movement, the labor movement, the civil rights movement, the feminist revolution, the gay rights movement, and so on.

Think of what this country would have been like if those ordinary people had never bothered to fight and sometimes die for what they believed in. Mr. Zinn refers to them as "the people who have given this country whatever liberty and democracy we have."

Our tendency is to give these true American heroes short shrift, just as we gave Howard Zinn short shrift. In the nitwit era that we're living through now, it's fashionable, for example, to bad-mouth labor unions and feminists even as workers throughout the land are treated like so much trash and the culture is so riddled with sexism that most people don't even notice it. (There's a restaurant chain called "Hooters," for crying out loud.)

I always wondered why Howard Zinn was considered a radical. (He called himself a radical.) He was an unbelievably decent man who felt obliged to challenge injustice and unfairness wherever he found it. What was so radical about believing that workers should get a fair shake on the job, that corporations have too much power over our lives and much too much influence with the government, that wars are so murderously destructive that alternatives to warfare should be found, that blacks and other racial and ethnic minorities should have the same rights as whites, that the interests of powerful political leaders and corporate elites are not the same as those of ordinary people who are struggling from week to week to make ends meet?

Mr. Zinn was often taken to task for peeling back the rosy veneer of much of American history to reveal sordid realities that had remained hidden for too long. When writing about Andrew Jackson in his most famous book, "A People's History of the United States," published in 1980, Mr. Zinn said:

"If you look through high school textbooks and elementary school textbooks in American history, you will find Jackson the frontiersman, soldier, democrat, man of the people - not Jackson the slaveholder, land speculator, executioner of dissident soldiers, exterminator of Indians."

Radical? Hardly.

Mr. Zinn would protest peacefully for important issues he believed in - against racial segregation, for example, or against the war in Vietnam - and at times he was beaten and arrested for doing so. He was a man of exceptionally strong character who worked hard as a boy growing up in Brooklyn during the Depression. He was a bomber pilot in World War II, and his experience of the unmitigated horror of warfare served as the foundation for his lifelong quest for peaceful solutions to conflict.

He had a wonderful family, and he cherished it. He and his wife, Roslyn, known to all as Roz, were married in 1944 and were inseparable for more than six decades until her death in 2008. She was an activist, too, and Howard's editor. "I never showed my work to anyone except her," he said.

They had two children and five grandchildren.

Mr. Zinn was in Santa Monica this week, resting up after a grueling year of work and travel, when he suffered a heart attack and died on Wednesday. He was a treasure and an inspiration. That he was considered radical says way more about this society than it does about him.