George Carlin, the Grammy-Award winning standup comedian and actor who was hailed for his irreverent social commentary, poignant observations of the absurdities of everyday life and language, and groundbreaking routines like “Seven Words You Can Never Say on Television,” died in Santa Monica, California, on Sunday, according to his publicist, Jeff Abraham. He was 71.The cause of death was heart failure. Carlin, who had a history of heart problems, went into the hospital on Sunday afternoon after complaining of heart trouble. The comedian had worked last weekend at The Orleans in Las Vegas.Recently, Carlin was named the recipient of the Mark Twain Prize for American Humor. He was to receive the award at the Kennedy Center in November. “In his lengthy career as a comedian, writer, and actor, George Carlin has not only made us laugh, but he makes us think,” said Stephen A. Schwarzman, the Kennedy Center chairman. “His influence on the next generation of comics has been far-reaching.”Carlin began his standup comedy act in the late 1950s and made his first television solo guest appearance on “The Merv Griffin Show” in 1965. At that time, he was primarily known for his clever wordplay and reminiscences of his Irish working-class upbringing in New York. In 1970, Carlin discarded his suit, tie, and clean-cut image as well as the relatively conventional material that had catapulted him to the top. Carlin reinvented himself, emerging with a beard, long hair, jeans and a routine that, according to one critic, was steeped in “drugs and bawdy language.” By the mid-’70s, like his comic predecessor Lenny Bruce and the fast-rising Richard Pryor, Carlin had emerged as a cultural renegade. In addition to his irreverent jests about religion and politics, he openly talked about the use of drugs, including acid and peyote, and said that he kicked cocaine not for moral or legal reasons but after he found “far more pain in the deal than pleasure.” But the edgier, more biting comedy he developed during this period, along with his candid admission of drug use, cemented his reputation as the “comic voice of the counterculture”. By 1977, when his first HBO comedy special, “George Carlin at USC” was aired, he was recognised as one of the era’s most influential comedians. He also become a best-selling author of books that expanded on his comedy routines.Carlin was born in New York City in 1937. “I grew up in New York wanting to be like those funny men in the movies and on the radio,” he said. “My grandfather, mother and father were gifted verbally, and my mother passed that along to me. She always made sure I was conscious of language and words.” During a career that spanned five decades, he emerged as one of the most durable, productive and versatile comedians of his era.