Question: A 1979 period children’s adventure film, directed by a man known for his socially critical directing style and for his socialist ideals, which are evident in his film treatment of social issues, was based off a novel by what author?

Context paragraphs:
Naadan Premam: Naadan Premam (English: Love in the Countryside ) is a Malayalam novel written by S. K. Pottekkatt in 1941.  It is a short novel written when the author was in Bombay and tells the story of an innocent village belle jilted by a modern man-about-town.  It is set entirely in Mukkam, a rustic village on the banks of Iruvanjippuzha, a major tributary of River Chaliyar.  Written initially as a film treatment and later converted into a novel, it was serialised in "Kerala Kaumudi" newspaper and released as a book in August 1941.  It was adapted into a film of the same name in 1972 but was not a success on the screen.

Ken Loach: Kenneth Charles Loach (born 17 June 1936) is an English director of television and independent film.  He is known for his socially critical directing style and for his socialist ideals, which are evident in his film treatment of social issues such as poverty ("Poor Cow", 1967), homelessness ("Cathy Come Home", 1966) and labour rights ("Riff-Raff", 1991, and "The Navigators", 2001).

Albert Chavannes: Albert Chavannes (February 23, 1836 – May 3, 1903) was a Swiss-born American author, philosopher, and sociologist, active primarily in the late 19th century.  He is best known for his two utopian novels, "The Future Commonwealth" and "In Brighter Climes", which discuss a fictional futuristic society, "Socioland," where the economy is governed by socialist ideals rather than capitalism, and where morality is based on social scientific experimentation, rather than traditional religion.  Chavannes was also one of the earliest social theorists to extensively discuss exchange theory, and his ideas on "magnetism" (magnetation) influenced writers such as J. William Lloyd and Ida C. Craddock.

Social ecology: Social ecology is a critical social theory founded by American anarchist and libertarian socialist author Murray Bookchin.  Conceptualized as a critique of current social, political, and anti-ecological trends, it espouses a reconstructive, ecological, communitarian, and ethical approach to society.  This version advocates a reconstructive and transformative outlook on social and environmental issues, and promotes a directly democratic, confederal politics.  As a body of ideas, social ecology envisions a moral economy that moves beyond scarcity and hierarchy, toward a world that reharmonizes human communities with the natural world, while celebrating diversity, creativity and freedom.  Bookchin suggests that the roots of current ecological and social problems can be traced to hierarchical modes of social organization.  Social ecologists claim that the systemic issue of hierarchy cannot be resisted by individual actions alone such as ethical consumerism but must be addressed by more nuanced ethical thinking and collective activity grounded in radically democratic ideals.  The complexity of relationships between people and nature is emphasized, along with the importance of establishing more mutualistic social structures that take account of this.

Social documentary photography: Social documentary photography or concerned photography is the recording of how the world looks like, with a social and/or environmental focus.  It is a form of documentary photography, with the aim to draw the public's attention to ongoing social issues.  It may also refer to a socially critical genre of photography dedicated to showing the life of underprivileged or disadvantaged people.

Survive AIDS: Survive AIDS is the group formerly known as ACT UP/Golden Gate.  In 1990, the ACT UP chapter in San Francisco split into two chapters, the San Francisco chapter and the Golden Gate chapter.  The catalyst for this was over decision-making processes, although it also involved many larger issues.  According to ACT UP/Golden Gate, "ACT UP Golden Gate concentrated on issues involving treatment and treatment access while ACT UP San Francisco focused on broader social issues involving public policy and politics.  Over the next several years the two ACT UP chapters worked separately and together on local and national AIDS issues."  But in 1994, the two organizations stopped working together, and they grew further apart.

Black Jack (1979 film): Black Jack is a 1979 period children’s adventure film, directed by Ken Loach and based on the Leon Garfield novel.  It is set in Yorkshire in 1750 and follows a young boy, Tolly (Stephen Hirst) and his adventures with a large French man (Jean Franval), the Black Jack of the title, and Belle a young English girl (Louise Cooper).  It was awarded the Critics’ Award at the Cannes Film Festival (1979).

Nila Madhab Panda: Nila Madhab Panda (born 18 October 1973) ) is an Internationally acclaimed Film Maker and Producer.  Panda has produced and directed over 70 diverse and cutting edge Films, documentaries and shorts.  These films are based on important social issues such as climate change, child labor, education, water issues, sanitation and many other developmental issues in India.  His films have won him several awards and critical acclaim.  Most of his films have unique insights drawn from his own life, the metaphorical distance that he has traversed from a small obscure village based in one of the remotest parts of India, to metropolitan cities across the globe.  His films are entertaining, yet portray profusely socially relevant themes; driving home the point that films can be a powerful medium of positive social change.

Plebania: Plebania (] ) is a Polish soap opera broadcast from October 5, 2000 to January 27, 2012 on TVP1.  The series is about the lives of ordinary people in the fictional Polish village of Tulczyn.  The plot revolves around the family, religious, and social issues of the village inhabitants with central roles played by a parish priest, his family and friends, and a wealthy business man known for shady dealings.  "Plebania" is the second-longest (after "Klan") Polish soap opera.

Envy (novel): Envy (Russian: "Зависть") is a novel published in 1927 by the Russian novelist Yuri Olesha.  It is remarkable for its poetic style, undulating modes of transition between the scenes, innovative structure, biting satire, and ruthless examination of Socialist ideals.

Supporting paragraphs: Black Jack (1979 film) Ken Loach
Answer: Leon Garfield