Pudovkin's seminal theoretical work, Film Technique, which argues that editing makes film a unique art form, and it needs to be employed to manipulate the medium to its fullest. Kubrick recommended this work to others for many years. Thomas Nelson describes this book as "the greatest influence of any single written work on the evolution of [Kubrick's] private aesthetics". Kubrick also found the ideas of Konstantin Stanislavski to be essential to his understanding the basics of directing, and gave himself a crash course to learn his methods. Kubrick's family and many critics felt that his Jewish ancestry may have contributed to his worldview and aspects of his films. After his death, both his daughter and wife stated that he was not religious, but "did not deny his Jewishness, not at all". His daughter noted that he wanted to make a film about the Holocaust, the Aryan Papers, having spent years researching the subject. Most of Kubrick's friends and early photography and film collaborators were Jewish, and his first two marriages were to daughters of recent Jewish immigrants from Europe. British screenwriter Frederic Raphael, who worked closely with Kubrick in his final years, believes that the originality of Kubrick's films was partly because he "had a (Jewish?) respect for scholars". He declared that it was "absurd to try to understand Stanley Kubrick without reckoning on Jewishness as a fundamental aspect of his mentality". Walker notes that Kubrick was influenced by the tracking and "fluid camera" styles of director Max Ophüls, and used them in many of his films, including Paths of Glory and 2001: A Space Odyssey. Kubrick noted how in Ophuls' films "the camera went through every wall and every floor". He once named Ophüls' Le Plaisir (1952) as his favorite film. According to film historian John Wakeman, Ophüls himself learned the technique from director Anatole Litvak in the 1930s, when he was his assistant, and whose work was "replete with the camera trackings, pans and swoops which later became the trademark of Max Ophüls". Geoffrey Cocks believes that Kubrick was also influenced by Ophüls' stories of thwarted love and a preoccupation with predatory men, while Herr notes that Kubrick was deeply inspired by G. W. Pabst, who earlier tried, but was unable to adapt Schnitzler's Traumnovelle, the basis of Eyes Wide Shut. Film historian/critic Robert Kolker sees the influence of Welles' moving camera shots on Kubrick's style. LoBrutto notes