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Oby Ezekwesili
She put Nigeria's oil revenues on the public record, then refused to let a kidnapping fade.
The rise
Born on 28 April 1963 in Anambra State, a chartered accountant with degrees from Nsukka, Lagos and the Harvard Kennedy School, she was among Transparency International's founding directors in Berlin before Obasanjo brought her home in 1999 to run the budget and procurement unit that earned her the name Madam Due Process.
What they did
As minister of solid minerals from 2005 and of education from 2006 she drove the Nigeria Extractive Industries Transparency Initiative, whose audits put oil and gas revenues on the record. She was World Bank vice-president for Africa from 2007 to 2012, co-founded #BringBackOurGirls after the April 2014 Chibok abduction, and in 2021 founded a school of politics now in four countries.
The full picture
Her 2019 presidential run collapsed: she withdrew on 24 January, weeks before the vote, after ballots with her name were printed, citing a divergence of values with her party, and critics read it as coalition-building weaker than her advocacy. Her ministerial record is tied to the Obasanjo government's contested privatisations.
Why it matters
She built a career on publishing figures governments wanted buried, and in February 2026 was still outside the National Assembly with a placard — civic authority exercised from outside power as hard as from inside it.
“Corruption is corrosive. It corrodes. It starts gently, and when you don't do anything about it, it becomes a monster.”