After the "Confessions" and "Rousseau judge of Jean-Jacques", the philosopher wrote between 1776 and 1778 these "Rêveries d'un promeneur solitaire" before ending his days with René-Louis de Girardin at the Château d'Ermenonville. Sketched out day by day on playing cards before being composed and structured into ten “walks” – the last remaining unfinished – they were only published posthumously in 1782, in Geneva, by three friends of the author. The ten “Rêveries” are so many introspections after an intensely paranoid and solitary episode in the life of J.-J. Rousseau. Autobiographical, they relate the main moments of his existence on earth, among others his happy stay at Lake Bienne, his botanical work, his significant encounters, the abandonment of his children, while meditating on fundamental philosophical questions: being, suffering, death, love, happiness, nature, morality, religion, society, misanthropy,... Foreseeing his imminent death, the author of the "Social Contract" and the "Nouvelle Héloïse" meditates on life by walking, herbalizing and contemplating nature, finding only in reverie her only effective consolation. A true inner song, “Les Rêveries du promeneur solitaire” has influenced many great thinkers and writers, from Goethe to Chateaubriand via Victor Hugo, George Sand, Lamartine and all the romantic poets. Of all the works of Jean-Jacques Rousseau, it is undoubtedly the one that remains closest to us today.