Who is the childhood of a leader based on?
The film chronicles the childhood of a fascist leader in the period immediately following World War I. Production began in early 2015, in Budapest, (Hungary). The film had its world premiere in-competition (Horizon section) at the 72nd Venice International Film Festival on 5 September 2015 and won two awards at the festival, Best Debut film and Best Director.
Who is the 2015 film the childhood of a leader based on?
a fascist leader in the period immediately following World War I a fascist leader
The Childhood of a Leader (film)
No context provided
Who is the 1939 short story the childhood of a leader based on?
borrowed from their own personal lives to build their protagonists, however Sartre denied the story being a biographical work
The Childhood of a Leader (film)
https://en.wikipedia.org/wiki/The%20Childhood%20of%20a%20Leader%20%28film%29
 It is the final story in Sartre's collection that reflects a significant change from non-existence to existence through chronicling the life of Lucien Fleurier since he was a child until he became an anti-Semitic Camelot who believes that he can become a real leader. 
The Childhood of a Leader (Sartre)
 It is loosely based on Jean-Paul Sartre's short story The Childhood of a Leader,
The Childhood of a Leader (film)
Due to the many similar characteristics and the friendship of the two authors it is assumed that Simone de Beauvoir's short story Marguerite influenced Sartre's The Childhood of a Leader and vice a versa. The two stories depict the lives of their protagonists chronologically, starting from their childhood. They are basically Bildungsroman , though Sartre rebukes the outcome of the main character's life. Both authors borrowed from their own personal lives to build their protagonists, however Sartre denied the story being a biographical work.
The Childhood of a Leader (Sartre)
The 2015 film The Childhood of a Leader chronicles the childhood of a fascist leader in the period immediately following World War I. It is loosely based on Jean-Paul Sartre's 1939 short story The Childhood of a Leader. This work chronicles the life of Lucien Fleurier from childhood until he becomes an anti-Semitic Camelot who believes that he can become a real leader. Due to the many similar characteristics in the stories and a strong friendship between the two authors, it is believed that Simone de Beauvoir's short story Marguerite influenced Sartre's The Childhood of a Leader and vice a versa. Both authors borrowed from their own personal lives to build their protagonists, however Sartre denied the story being a biographical work.