"We must fight globalisation which is for the high and mighty... This is the task of the forum.
"All Bush wants is Iraqi oil, because Iraq produces 64 percent of oil and he wants to get hold of it.
"Bush is acting outside the United Nations and both he and (British Prime Minister) Tony Blair are undermining the United Nations, an organisation which was an idea sponsored by their predecessors."
Mandela also questioned whether the US was ignoring the UN because its secretary-general is black.
"Because they (America) are so arrogant, they killed innocent people in Japan during Hiroshima and Nagasaki," he said referring to the two atom bombs the US dropped on Japanese cities to end the Second World War.