In 1960, Pier Paolo Pasolini published by Einaudi publishing his book of poetic essays entitled Passione e Ideologia. That work reflects the emotional and intellectual relationship of the author with the Italian dialectal poetry. Starting from the gathering of dialectal songs done by folklorists of the Italian Oitocento such as Pitrè, Tommaseo and Nigra, Pasolini thought over the dialectal poetry as a popular Italian poetry par excellence. In this sense, we intend to demonstrate how Pasolini, refereed by reading the works of the critics Benedetto Croce and Gianfranco Contini, promoted a mapping of the main references that justify the possible affinities of poetry in dialect with a alleged folk poetry. Authors such as Dante, Vico, Rousseau, Herder and Giovanni Pascoli were mobilized by him among those who thought poetry as the first language of men, coming from the vulgar, and above all, as the result of a felt and imagined activity.