At the opening of the five-day event, some 25,000 activists paraded exuberantly through Porto Alegre on Monday, serenaded by the pounding of drums and salsa blared from sound trucks as they waved communist flags and shouted slogans against corporate greed.
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Gustavo de Biase, a 22-year-old Brazilian wearing a shirt proclaiming "Socialism is Liberty," said the world's leftists are convinced they can get presidents from the U.S. to Brazil to embrace policies "of respect and equality aimed at lifting the poor out of misery."

"We want to distribute the riches to people," he said. "We're fighting for a more equal society and we're saying 'Down with hunger' and 'Down with war.'"
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Activists said this year's forum is especially important because governments from the United States to Europe are moving to take on bigger roles in managing the global economy.