He stated this in Abeokuta at a symposium titled 'Purpose and Utilitarian Values of Presidential Libraries', held as part of the programme for his 80th birthday celebration.
Mr. Obasanjo was replying to comments by Mr. Ali about their past relationship in government.
He quickly added that Nigeria would not die like the PDP.
Elected president twice on the platform of the PDP,Obasenjo stressed that the party is dead, sunk and gone.
He recalled that he asked Mr. Ali to lead the party because of his integrity, saying PDP was controlling 30 out of the 36 states.
“Ahmadu Ali is truthful and that was why I brought him to head the PDP and all went well. When Ahmadu Ali was the national chairman. We were controlling 30 out of the 36 states. When Ahmadu and I left, the fortune of the PDP began to sink”, he said.
“Whether you believe it or not, today PDP is sunk and gone. May the fortune of Nigeria never sink like that of the PDP” he said, with the audience responding in a thunderous “Amen.”
Mr. Obasanjo while also responding to encomiums poured on him by dignitaries at the event, said the Olusegun Obasanjo Presidential Library was established to correct one of the mistakes he made when he first led Nigeria as a military Head of State.
The mistake, he said, was not collecting and archiving materials connected to his time during the civil war.
“Somebody among the speakers said God has always given me the opportunity to correct my wrongs. I will say God has done that for me not in all cases but in most cases and this Presidential Library is actually an act of God which he has given to me to correct one of my mistakes of the past and I have said this very often.
“I was in the war front, it was very one significant thing in my life and in the life of Nigeria. I was military Head of State, it was one significant thing in my life and in the life of Nigeria.
“But I was not as mindful as I should have been about collecting materials that were connected with those events, the war front and civil war both on the vandals' side – we called them rebels' side or if you like the Biafrans' side – they called us vandals, we called them rebels.
“But we did collect something. When I was also the military Head of State, I didn't pay much attention to collect materials, where I should have paid attention to. So, by 1988, it occurred to me that these were mistakes, I looked at some of the materials we got from the war fronts, they were in very bad state of neglect so what I did was to try and micro-film what we could micro-film.
“I also learnt a lesson; when you are in a position to keep materials and preserve them for prosterity, you should do so and I never knew there will be another opportunity. So, God created another opportunity for me to correct the mistakes of the past.
“God is the God and for some of us He is not God of second chance but God of many chances and I will be eternally grateful to God for the opportunity he has given me.
“But more importantly, whatever I might have achieved, I take responsibility; but whatever I might have achieved, it would not have been possible without the people who have helped me in life to be able to achieve what I have achieved.
“Take the Presidential Library for example, if not for the members of Board of Trustees, I would have fallen by the roadside and that would have been another mistake, because it got to a stage that things were rough, things were rough and we were just putting heads together. It is God of many chances.”
He urged the youth who attended the programme not to be mindful of their current positions, whether poor or weak, assuring that if he (given his poor background) could make it this far, they can also make it.
In his remarks, former U.S. Ambassador to the United Nations,UN, Andrew Young, said that without Obasanjo, Africa might still be in a desperate position.
“It is time for Nigeria to realise and make amends where it is lagging behind”, Mr. Young said.
“There is no human being in Africa that has experienced what Obasanjo has gone through in the last 50 years. One thing about him is that he is the same way, same person, whether in New York, UN, World Bank, White House or China. He does not change. He does not give a damn who he makes mad,” he said.
He said Mr. Obasanjo should be celebrated, adding that “the Presidential Library will help others to understand his work.”
Similarly, Tracy Roosevelt, grand daughter of a former U.S. President, Franklin D Roosevelt, explained that a Presidential Library is a place, meant to bring together the memories of the past and to also bring men and women together for higher goals.
Ms. Roosevelt said Mr. Obasanjo gave the gift of the library to his people, to share the memories of his past with his people.
“There are 14 presidential libraries in the the United States of America, but the first Presidential Library in Africa was created by Obasanjo in Abeokuta,” she said.