Howard Zinn, the internationally acclaimed author of the best-selling book, "A People's History of the United States," kicked off his book tour on May 1 in New Haven. He spoke to an audience of several hundred people, and discussed history from the perspective of the working class citizen, which has been a theme in his literature since the beginning.
Listen to Zinn give his lecture (30 seconds..)

He explained the depth to which class struggle has existed: over centuries and across continents. His presence in New Haven was in honor of MayDay, the national day for workers' rights.

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In the Wikipedia, you can find more information
about A People's History of the United States
or about Howard Zinn.