Ralph Christian Möbius, known professionally as Rio Reiser, was a German musician and from 1970 to 1985 the lead singer and main lyric-writer for the rock group Ton Steine Scherben. After that band broke up, he worked as a solo artist. Among his best known songs are Macht kaputt, was euch kaputt macht, Keine Macht für Niemand, and the Rauch-Haus-Song with the Ton Steine Scherben. As a solo artist, his best known songs are König von Deutschland, Alles Lüge, and Junimond. Reiser supported squatting in the early 1970s and later the green political party Die Grünen. After the German reunification, he joined the Party of Democratic Socialism.

Ton Steine Scherben was one of the first and most influential German language rock bands of the 1970s and early 1980s. Well known for the highly political and emotional lyrics of vocalist Rio Reiser, they became a musical mouthpiece of new left movements, such as the squatting movement, during that time in Germany and their hometown of West Berlin in particular. Today, after the band's demise in 1985, and the death of Rio Reiser in 1996, Ton Steine Scherben have retained a cult following and popularity in the related scenes. Recently, some of the remaining members have given reunion concerts.