In a fiery and passionate speech, journalist Bill Moyers urged the nearly 2,000 in attendance Tuesday night to fight the crumbling of America’s democracy through civil engagement.

“I believe this nation can’t survive half democracy and half oligarchy, just as it can’t survive half slave and half free,” said Moyers, who at times had the air of a Southern Baptist minister preaching to his congregation.

Moyers derived much of Tuesday’s lecture, held in the muggy Ben Light Gymnasium, from his latest book “Moyers on America: A Journalist and His Times.” Moyers, whose three-day visit to the college was part of the annual Park Distinguished Visitor Series, said three forces have aligned to take control of the nation.

“The political right, the religious right and joined with the corporate right create a powerful force in American life,” Moyers said in a media session earlier in the day. “The religious right provides the foot soldiers, the political right provide the ideas and the corporate right provides — through all the subsidies and offshore tax breaks — the spoils of victory.”

During his public lecture later that night, he said, “The vultures are circling the carcass of democracy.”

Recently, Moyers has received even more criticism than usual from the political right. In December, he stepped down after three years as anchor and editor of the Public Broadcasting Service show “NOW With Bill Moyers.” Just weeks earlier, Ken Tomlinson, chairman of the Corporation for Public Broadcasting, which oversees PBS and National Public Radio, told PBS executives that the nation had shifted to the right and so should the organization’s programming.

“I always knew Nixon would be back,” Moyers said in a speech at the National Conference on Media Reform in May. “I just didn’t know this time he would ask to be the chairman of the Corporation for Public Broadcasting.”

Moyers said too many people confuse patriotism with nationalism.

“Sometimes the best way to stand up for your country is to stand up to your government,” he said in the media session.

Many of Moyers’ 30-plus years in the media were spent in public broadcasting. Throughout his career as a journalist, he has won more than 30 Emmy Awards. Before his career as a journalist, Moyers was one of the original organizers of the Peace Corps during the John F. Kennedy administration and served as press secretary and special assistant to the president during the Lyndon Johnson administration.

Junior Christina Nielsen said she hopes Moyers’ message was a wake-up call for apathetic students.

“I think it’s really good to have people like Bill Moyers here to give us a reality check,” Nielsen said. “I think people who go to see Bill Moyers probably agree with him anyways, but there may have been people here who got a jolt.”

Dianne Lynch, dean of the Roy H. Park School of Communications, introduced Moyers as his generation’s Edward R. Murrow. Shortly after his speech, she said she had already received six requests for video-tape recordings of the event.

“For me, it’s so important for students to be exposed to somebody who is as well read, thoughtful and critical of our current political, economic and social condition, and Bill Moyers is known around the world as one of the wise men of our age,” Lynch said. “And he speaks from great experience inside government, outside government, in politics, outside politics, as a journalist and no longer as a journalist.”

Moyers, 70, said he hasn’t made any solid decisions about his future, but he did say he wants to produce documentaries about Hurricane Katrina, the government’s post-Sept. 11 policy on torture and the fusion of the political right and religious right as the dominant coalition in American politics.

“I have a large filing cabinet of unfulfilled interests, including hundreds of people that I would like to interview and scores of stories that I would like to turn into documentaries,” Moyers said.

Elizabeth Pickard contributed to this story.