How did free verse develop through French Symbolist poetry?

The development of vers libre (free verse) within French Symbolism was driven by a desire to escape the rigid conventions of traditional French prosody, such as the alexandrine line, in favor of rhythms dictated by the poet’s inner thoughts and sensations.12

Symbolist poets sought to express individual emotional experiences and the mystery of existence, leading them to reject formalized oratory and expository functions in poetry. To achieve this, they experimented with prose poems and flexible metrical structures. In vers libre, the traditional fixed-syllable line was replaced by the phrase as the basic metrical unit, allowing line lengths to vary according to the poem's meaning, while rhyme became optional.13

This innovation emerged in the late 1880s, with Gustave Kahn and Jules Laforgue often cited as its primary inventors and advocates. Their work was influenced by earlier experiments from poets like Arthur Rimbaud and Victor Hugo, ultimately establishing a new tradition that prioritized personal expression over strict technical rules.342