He was, like his contemporary, Rutebeuf, a defender of Guillaume de Saint-Amour and a bitter critic of the mendicant orders.
Jean de Meung says that in his youth he composed songs that were sung in every public place and school in France.
The date of this second part (lines 4,089–21,780[2]) is generally fixed between 1268 and 1285 by a reference in the poem to the death of Manfred and Conradin, executed in 1268 by order of Charles of Anjou (d. 1285) who is described as the present king of Sicily.
The continuation of Jean de Meun is a satire on the monastic orders, on celibacy, on the nobility, the papal see, the excessive pretensions of royalty, and especially on women and marriage.
His poem shows in the highest degree, in spite of the looseness of its plan, the faculty of keen observation, of lucid reasoning and exposition, and it entitles him to be considered the greatest of French medieval poets.
He handled the French language with an ease and precision unknown to his predecessors, and the length of his poem was no bar to its popularity in the 13th and 14th centuries.