Student protesters march against capitalism at the first World Social Forum in Porto Alegre in 2001. (AP Photo/Douglas Engle)
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World Social Forum 2002: a protester dressed as Uncle Sam during a demonstration in the streets of Porto Alegre against the US-proposed Free Trade Area of the Americas. (AP Photo/Dado Galdieri)
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World Social Forum 2003: Tens of thousands demonstrate against a possible US-led war in Iraq and a proposed Free Trade Area of the Americas. (AP Photo/Dado Galdieri)
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World Social Forum 2004: Tribal men from India march in Bombay, the first time the forum is held outside Brazil. (EPA/Harish Tyagi)
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World Social Forum 2005: The Brazilian president, "Lula" launches the "global call against poverty", in Porto Alegre. (AP Photo/Silvia Izquierdo)
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World Social Forum 2006: An activist wears a hat which reads "Radical Subversion, No to capitalism" at the forum in Caracas, Venezuela. (AP Photo/Fernando Llano)
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World Social Forum 2007: Delegates demonstrate in Nairobi against Economic Partnership Agreements (EPAs), which they see as unfair trade agreements with African, Caribbean and Pacific countries. (EPA/Stephen Morrison)
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World Social Forum 2008: An immigrant peers through a hole in a banner during a solidarity rally in Madrid. (EPA/Acero)
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World Social Forum 2009: Native Brazilians at the debate on the indigenous people of the Amazonia, in Belen, Brazil. (EPA/Oswaldo Forte)
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World Social Forum 2010: A peace rally at the beginning of the forum in Porto Alegre. (EPA/Neco Varela)
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Looking back over ten years.
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The World Social Forum has met every year since 2001, as a counter-weight to the World Economic Forum in Davos.
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