Bob Geldof has attended a London screening to launch the DVD of the Live 8 concerts which were held in July.
Sir Bob Geldof said the concerts had "worked magnificently" politically
Geldof has said he wants the DVD to be "the biggest-selling DVD of all time" when it is released on 7 November.
The full line-up from the UK and US concerts are on the DVD, along with excerpts from shows in other countries.
Geldof said he had been anxious the gigs would not be a success, but now thought them the "the greatest cultural event of the 21st century so far".
Unlike the original Live Aid, Live 8 was not about raising money but raising awareness of the plight of Africans living in poverty.
The concerts were designed to coincide with the meeting of G8 leaders gathering in Scotland.
Geldof said: "I felt pretty relieved afterwards because I didn't think it would work but it worked magnificently in the political sense.
"We were able to write the agenda and boys and girls with guitars were able to write the agenda and push it to the top table of world politics on behalf of the poor."
Asked why people should buy the DVD, from which profits go to charity, Geldof said: "Literally we begin to see the beginning of the end of poverty in Africa.
Sir Bob attended the DVD premiere with his daughters
"When you look at Live 8 it's a reminder that you're not helpless and not powerless in the face of politics."
He added: "If you say you are a music fan and you don't like Live 8 you're an idiot."
A percentage of profits from the DVD will go towards charities working in Africa.
More than 150,000 watched the concert in London's Hyde Park on 2 July, with 9.6 million watching it on TV in the UK.
Highlights on the London stage included Pink Floyd, Sir Paul McCartney's rendition of Sgt Pepper's Lonely Hearts Club Band and performances from U2 and Robbie Williams.
Another nine concerts were held in Philadelphia, Paris, Berlin, Rome, Toronto, Moscow, Johannesburg and Tokyo.
About 150 TV channels and 400 radio stations around the world broadcast the concerts.
It took nearly 20 years for Live Aid gigs to be released on video or DVD.
Bob Geldof, who organised both Live Aid and Live 8, has been named the 2005 Man of Peace.
The Gorbachev Foundation, on behalf of the Nobel Peace Laureates, said Geldof had been given the honour because of "his unflagging work and powerful voice on behalf of the poor of Africa over the last 20 years and in particular the last 12 months".
Geldof was chosen as this year's recipient by past Nobel peace prize winners and will receive the honour at a ceremony in Rome on 24 November at the World Summit of Nobel Laureates.
Geldof said receiving the award was "more than an honour, it's almost ridiculous."
He said: "It's almost too big, all the Nobel Peace Prize winners voting for you as their Man of Peace.
"I feel weird. Not even proud, just weird."