Julian Casablancas favorite philosopher, whose work, Casablancas claims, held truth as an important standard value. He recognizes Paul Robeson as someone who used his musical platform to help further his serious political intrigue and as someone who, therefore, serves as a role model for politically engaged musicians. Casablancas has been a guest on the Russian sponsored program "Redacted Tonight", as well as included its host, Lee Camp, as an opener for a Voidz show in Houston, Texas in October 2018. Casablancas, along with the Strokes, provided vocals on a cover of Marvin Gaye's "Mercy Mercy Me (The Ecology)" with Joshua Homme on
Julian Casablancas sang about drugs and sex, about the people around him — it was so matter-of-fact," Casablancas stated in a "Rolling Stone" interview. "Reed could be romantic in the way he portrayed these crazy situations, but he was also intensely real. It was poetry and journalism." Additionally, he has stated that Bob Marley, Nirvana and Pearl Jam are major influences on his work, the latter being the reason he started making music, upon hearing the song "Yellow Ledbetter". Julian, in agreement with several members of The Voidz, has named Stevie Wonder as being a composer with a “next level mind". Julian