Rousselian

adjective2

1. •
   Of or relating to Raymond Roussel (1877–1933), French writer.
2. •
   Pertaining to the life or doctrines of the Genevan philosopher Jean-Jacques Rousseau.

   • But it is to the United States that we must turn if we would see the re-incarnation of the Rousselian spirit at its best and at its worst […]. — 1911