The leader of a new political party in South Africa has said at the movement's formal launch that it will offer a home to all of the country's racial groups.
Former Defence Minister Mosiuoa Lekota said the Congress of the People, or Cope, was the "party of the future".
Correspondents say the party could present real opposition to the African National Congress for the first time.
It is made up largely of ANC defectors, and will challenge the governing party in national elections next year.
Mr Lekota was speaking in Bloemfontein, where he was named as Cope's president.
"The history of South Africa will never be the same again," he said to a cheering crowd of some 4,000 delegates.
"Ours shall be a truly non-racial party that will provide a true home to all South Africans irrespective of race, class or gender."
The ANC has ruled South Africa since the end of white minority rule 14 years ago.
South Africa's main opposition party until now, the Democratic Alliance, draws most of its support from white and mixed-race voters.
Cope emerged after Thabo Mbeki resigned as president in September after a power struggle with ANC leader Jacob Zuma.
Many supporters of the new party were unhappy at the way in which Mr Mbeki was forced to step down.
The BBC's Peter Biles reports from Bloemfontein that delegates have been locked in feverish political debates.
They see the launch as a key moment that signals the growth and development of South Africa's young democracy, he says.
Mr Zuma is also in Bloemfontein on Tuesday for a party rally widely seen as an attempt to divert attention from the launch of Cope.
"It is a call to us, as former soldiers of [ANC's now-defunct military wing Umkhonto weSizwe] MK, to participate in today's battles, the battles that are more important, the battles of building a new nation, of developing South Africa," he said.
As it confirmed Mr Lekota as its leader, Cope named the former premier of Gauteng province, Mbhazima Shilowa, as its first deputy president.
The party also unveiled its latest high profile supporter, the anti-apartheid activist and cleric Allan Boesak.
Mr Boesak was given a rapturous welcome by Cope supporters, before telling them that the tide had turned against the ANC.
Mr Lekota, who has ruled out any reconciliation with the ANC, said that expanding the economy would be the linchpin of Cope's electoral campaign.
"We need to fight joblessness and grow our economy," he said.
"Our approach is stability, hard work and growth."
South African analyst William Mervin Gumede told the BBC's Focus on Africa programme that Cope is already starting to change the country's politics.
"Cope has changed the ANC already - the ANC is trying to be more accountable, the ANC is trying to be more consultative and is going to the electorate to explain its decisions - something it hasn't done in the past."
The breakaway party's formation has been marked by a lengthy and problematic search for a name.
The ANC has laid claim to the Congress of the People, since it was the name used for a historic, ANC-sponsored event in 1955.
But the High Court ruled earlier this month that the new party could use the name.
Cope was already the party's third choice.
Its first choice - South African National Congress - was challenged by the ANC, which said it was too similar to its own name.
Their second choice - South African Democratic Congress - was already registered as a party.
In its first electoral test earlier this month, the ANC dissidents won 10 of 27 wards in the Western Cape - the province where the ANC has always been least popular.
The Cope members had to stand as independent candidates because of the dispute over the party's name.
Our correspondent says the challenge for the new party is to distance itself from Mr Mbeki, and not appear like a group of embittered losers from last year's ANC national conference in Polokwane, where Mr Zuma defeated Mr Mbeki in a leadership contest.
But he also says that Cope, which says it has more than 400,000 members, is in a position to make serious inroads into ANC dominance.
The ANC has around 650,000 paid-up members.