
Robert Redford described the tone of this year's Sundance festival as 'dark and grim'. Photograph: Lucas Jackson/Reuters
A Louisiana-set drama about a father and his daughter threatened by the impact of global warming, the autobiographical tale of a man's quest to lose his virginity despite living out much of his life in an iron lung and a polemical documentary targeting America's war on drugs were among the top prize-winners as the Sundance film festival reached its denouement at the weekend.
Beasts of the Southern Wild, the story of a six-year-old girl living with her dad in the flood-threatened basins near the Mississippi delta, won both the jury prize for best US drama and a cinematography prize. Benh Zeitlin's film features a cast of non-actors and has been praised by the Guardian's Damon Wise as "the first significant eco-threat movie to be seen through the eyes of the generation that has inherited global warming".
The Surrogate, which is based on the autobiographical writings of journalist and poet Mark O'Brien, won the US drama audience award and a special jury prize for the acting of its cast. The film, which details the efforts of a 38-year-old semi-paralysed polio victim (Martha Marcy May Marlene's John Hawkes), to embark on a sexual awakening via a "sex surrogate" played by the Oscar-winning actor Helen Hunt, has already picked up one of the festival's most lucrative distribution deals in the form of a $6m sale to studio Fox Searchlight. Jeremy Kay called it "an unexpected crowd-pleaser" with a "mesmerising" performance from Hawkes and tipped the latter for Oscars glory in 2013.
The House I Live In, which documents the failure and the fallout for impoverished areas of America's war on drugs, won the documentary grand jury prize. Speaking at Saturday's awards ceremony, director Eugene Jarecki labelled authorities' battle against the drug trade "tragically immoral and so heartbreakingly wrong and misguided". Citing the large number of unfair drug penalties affecting minorities, as well as the country's high prison population, he said the war was "a terrible scar on America". The US documentary audience award went to another controversial piece, Kirby Dick's The Invisible War, which exposes the high number of instances of rape and sexual assault in the US military. Both films reflected the "dark and grim" tone of this year's Sundance, described by founder Robert Redford, who had warned during the festival's launch that this year's crop of movies mirrored current US travails. Ai Weiwei: Never Sorry, Alison Klayman's film about the renowned Chinese artist and activist's increasingly public clashes with the Chinese government, won the US documentary special jury prize.
Outside the competition, there was British success for Oscar-winning UK film-maker James Marsh, whose film Shadow Dancer was well-received. It tells the story of an Irish mother from an IRA-supporting family who is encouraged to become an informant by MI5. Starring Clive Owen and Andrea Riseborough, it was described by Wise as a "film that will surprise those who know Marsh only from his docs – the Oscar-winning Man on Wire and Bafta-nominated Project Nim – and also cement the director's reputation as one of the UK's leading auteurs".
Sundance, which was founded as the Utah/US film festival in Salt Lake City in August 1978 and took on its present moniker in 1991 following several years of Redford's involvement and sponsorship, has become known as the premier US event for independent film-making. Recent years have seen films such as An Education, Precious and Little Miss Sunshine, all of which screened at the festival, go on to win major awards.
Full list of Sundance winners
Grand jury prize, documentary: The House I Live In
Grand jury prize, drama: Beasts of the Southern Wild
US directing award: The Queen of Versailles, Lauren Greenfield
US directing award: Middle of Nowhere, Ava Duvernay
Waldo Salt screenwriting award: Safety Not Guaranteed, Colin Trevorrow
Audience award, US documentary: The Invisible War
Audience award, US dramatic: The Surrogate
Special jury prizes, US documentary: Love Free or Die and Ai Weiwei: Never Sorry
US dramatic special jury prize for producing: Jonathan Schwartz and Andrea Sperling, Smashed and Nobody Walks
US dramatic special jury prize for Ensemble Acting: The Surrogate
Shorts audience award: The Debutante Hunters
Excellence in cinematography, US documentary: Chasing Ice
Excellence in cinematography, US dramatic: Beasts of the Southern Wild
US documentary editing award: Detropia
Best of next award: Sleepwalk With Me
Alfred P Sloan feature film prize: Robot and Frank and Valley of Saints
World cinema jury special prize, Documentary: Searching for Sugar Man
World cinema documentary editing: Indie Game: The Movie, Lisanne Pajot and James Swirsky
World cinema jury prize,documentary: The Law in These Parts, Ra'anan Alexandrowicz, director
World cinema dramatic special jury prize: Can, Rasit Celikezer, director
World cinema cinematography award, drama: David Raedeker, My Brother the Devil
World cinema cinematography award, documentary: Lars Skree, Putin's Kiss
World cinema directing award, documentary: Emad Burnat and Guy Davidi, 5 Broken Cameras
Shorts audience award: The Debutante Hunters, Maria White, director
World cinema audience award: Searching for Sugar Man
