A new film titled The Divide is definitely a film worth watching for Sociology students. It is based on The Spirit Level, a highly influential piece of research by Richard Wilkinson and Kate Pickett which argued that the greater societal inequality, the greater the social problems. Countries such as the USA and the UK have some of the highest inequality in the world and consequently Wilkinson and Pickett argue they have some of the worst social indicators in the world.
Keep an eye out for the film: http://thedividedocumentary.com/
The Spirit Level: http://www.amazon.co.uk/The-Spirit-Level-Equality-Everyone/dp/0241954290