[1] In 1988, he chaired a Constituent Assembly to propose a draft constitution for Nigeria's Third Republic.
Aniagolu was born in Eke to the family of Aniagolu and Monica Onwusi, his father was a farmer; his uncle was Onyeama Onwusi, the Warrant Chief of Eke and he was a cousin of Charles Onyeama, a judge of the World Court.
[2] Aniagolu attended two primary schools in Eke and Udi and then, he was awarded a scholarship to study at Government College, Umuahia; he finished in secondary education at Christ the King College, Onitsha.
Thereafter, he established a law practice in Enugu until 1965 when he became a judge of the High Court of Eastern Nigeria.
While practicing law in Enugu, he was a member of the Federal Electoral Commission of Nigeria from 1958 to 1965.