Incoming Taoiseach Enda Kenny has pledged a new era of government focused on public duty not personal entitlement in a rousing address to jubilant supporters.
In an emotive speech to party faithful, he said the Irish people stood at a transformative moment in their history.
As Fine Gael stood poised to enter Government for the first time in 14 years, he promised an administration of compassion, generosity and hope.
"A new government that will be one of responsibility, not privilege, a government of public duty not personal entitlement, a government looking with confidence and courage to the future, not with guilt and regret at the past," he said.
Fresh from his poll-topping result in his Mayo constituency in the west of Ireland, Mr Kenny pledged to bring people closer to government.
And he vowed to restore the sense of integrity, worth and value in Ireland and claimed the new administration would not shirk its responsibility.
"We stand on the brink of fundamental change in how we regard ourselves, in how we regard our economy and in how we regard our society," he said.
With all bar four of the 43 constituencies in Ireland's General Election finished counting, the country's political scene had undergone a sea change.
Fine Gael is the largest party for the first time in its history and destined for coalition with Labour or heading a government propped up by Independents.
At 5pm on Sunday, with recounts granted in Galway East and West and seats still vacant in Wicklow and Laois-Offaly, 150 of the 165 seats had been filled and the state of the parties was as follows: Fine Gael 68; Labour 35; Fianna Fail 17; Independents 13; Sinn Fein 13; United Left Alliance 4.