Sinn Féin is to press the Government to open up a debate in 2005 on the issue of an united Ireland, the party's president, Mr Gerry Adams, said tonight.
Mr Adams made the pledge to supporters as he led celebrations to mark Sinn Fein's 100th anniversary in Dublin.
He said: "Later this year we will be launching a campaign for the Irish Government to bring forward a Green Paper on Irish Unity."
Tonight's Cead Bliain/Sinn Féin 100 event in the capital's Mansion House triggers a year-long celebration to mark the party's foundation in 1905.
Mr Adams added: "This year is about Sinn Féin taking more decisive steps forward toward our goal of a united, free and independent Ireland."
He said Sinn Féin was the "fastest-growing party in the country" and said his goal was to have a branch in every electoral ward.
"We must use our present mandate as a launching pad to grow an island-wide, a nationwide mass Sinn Féin movement," he added.
He said the party - which is the oldest in Ireland - planned to promote the Irish language during 2005 to create a "truly bilingual nation".
"Our political opponents, and even those who should be our allies in the struggle for Irish freedom and peace, fear our growing electoral strength.
"It is amazing to watch the feverish efforts of parties in this part of the island rushing to claim their republican and Sinn Fein roots while attacking and condemning us.
"We have no fear of that. If Labour and Fianna Fail and Fine Gael and the rest want to be republican, then Sinn Féin welcomes that. The more the merrier. We have no monopoly on that."