In the early 70s, he was the leader of the glam movement, introducing androgyny and bisexuality to the music industry, bringing in visuals from the decidedly underground drag and cabaret scenes. In the mid-70s, he crossed American soul into British pop, creating an image that has been used ever since by thousands of lesser pop musicians.<p>Besides making his own records, he produced albums for barely-controllable outsiders like Lou Reed and Iggy Pop, helping them achieve pop crossover success and survive their own demons.<p>In the late 70s, he went to Berlin and cranked out three albums of ambient, experimental music that kicked open doors for radical new sounds that fueled the New Wave movement (again with shallow imitation). But he ignored New Wave himself, and instead made fresh, soulful, pop with Let&#x27;s Dance. In the 1990s, he got heavily involved in the early internet, putting multimedia content on cds and even founding an ISP.<p>He dialed things back in the 2000s, as age and health took their toll. His two most recent albums were his first in many years. The Next Day was a throwback to his 1970s rock styles. Blackstar brought in jazz and modern hip-hop ideas.<p>One of the most amazing things about his output, besides how many times he forged new sounds and new visuals for the entire industry, is how timeless it all is. Pretty much all of his records, especially the best ones, sound timeless and modern, even decades later.