The film is based on the book by Paolo Lins. It gives you an insight into what was life like living in the Favelas from the perspective of someone who lived there. Mierelles, when reading the book, was shocked as he, Brazil and the rest of the world did not have a clear understanding into what life is like in the Favelas. Mierelles, when making the film, took into account Brazilian audiences. Originally, a lot of information about the Favelas came from middle-classes. It was the first film of its kind and Mierelles wanted to visualize what Lins saw. The film had such an impact that the Brazilian president went to Mierelles and said the film changed policies on public security. After the film was set, the Favelas got a lot worse. Permission was granted by community centers in the Favelas to allow the film to be shot in certain areas. No direct contact was made with any drug dealers. The frequent use of music in the film, reflects on the Brazilian culture. The upbeat music is ...