Nicola Abbagnano (niˈkɔla abbaɲˈɲano; 15 July 1901 – 9 September 1990) was an Italian existential philosopher.
Nicola Abbagnano was born in Salerno on 15 July 1901. He was the first-born son of a middle-class professional family. His father was a practicing lawyer in the area. He studied in Naples, and in November 1922 obtained a degree in philosophy, his thesis that became the subject of his first book Le sorgenti irrazionali del pensiero (1923). His mentor was Antonio Aliotta. In the following years, he taught philosophy and history at the Liceo Umberto I°, in Naples, and from 1917 to 1936 he was the professor of philosophy and pedagogy in the Istituto di Magistero Suor Orsola Benincasa. At the same time, he actively contributed as secretary of editorial staff to the review of Logos, edited by his mentor Aliotta. From 1936 to 1976 he was a full professor of History of Philosophy, and then in 1939 he was appointed to a full-time professorship at the Faculty of Letters