“LOS ANGELES (Reuters) – Comedian George Carlin, a counter-culture hero famed for his routines about drugs and dirty words, died of heart failure at a Los Angeles-area hospital on Sunday, a spokesman said. He was 71.

Carlin, who had a history of heart and drug-dependency problems, died at Saint John’s Health Center in Santa Monica about 6 p.m. PDT (2 a.m. British time) after being admitted earlier in the afternoon for chest pains, spokesman Jeff Abraham told Reuters.

Known for his edgy, provocative material, Carlin achieved status as an anti-Establishment icon in the 1970s with stand-up bits full of drug references and a routine called “Seven Words You Can Never Say On Television.” A regulatory battle over a radio broadcast of the routine ultimately reached the U.S. Supreme Court.”

One, if not the top, free thinkers of this era. He will truly be missed.