This is an important film! The same with the book [Oil, By Sinclaire Upton. The book is far better than the film because there are more details and the atmosphere is incredible. You real feel that you are presence in these characters, and of course the most eye-catching is that there are women in the book who have important role to play and whereas in the film, you will see only a fraction of a second of a woman's arm!]. Once you get the book, you can't stop to continue to read it.
I hope you all will enjoy this film as I did, but I must say that this film was made to watch in a cinema. At the ending, you feel that the earth is swallowing you down because of all the blasphemous remarks spouted out!