Bowie's songs and stagecraft brought a new dimension to popular music in the early 1970s, strongly influencing both its immediate forms and its subsequent development. Bowie was a pioneer of glam rock, according to music historians Schinder and Schwartz, who credited Marc Bolan and Bowie with creating the genre. At the same time, he inspired the innovators of the punk rock music movement. When punk musicians were "noisily reclaiming the three-minute pop song in a show of public defiance", biographer David Buckley wrote that "Bowie almost completely abandoned traditional rock instrumentation." Bowie's record company promoted his unique status in popular music with the slogan, "There's old wave, there's new wave, and there's David Bowie".