There are few filmmakers whose work I revere more that of Alejandro González Iñárritu. It was his second film, 21 Grams that first opened my eyes to cinema as an art. Prior to Oscars sensations Birdman and The Revenant, Iñárritu dealt unflinchingly with some of the most distressing aspects of humanity. From Mexican dog fighters to victims of human trafficking, his characters come from some of the most deprived communities. Sometimes battling terminal illnesses (which  Iñárritu viscerally depicts) they experience the cruelty and violence of life and death. Each of his first four films – Amores Perros (2001), 21 Grams (2004), Babel (2007) and Biutiful (2011) – elicits a very personal response from the viewer. Now Amores Perros has returned to MUBI as part…