At the weekend I went to the Sundance Film Festival which ran for the first time in London.

One of the documentaries was a cracking new film called Finding North about the food crisis in the US. One in six Americans don't get enough to eat on a regular basis. The film explores the causes of this - giving voice to the millions who struggle to find enough to eat.

Afterwards we spoke with the directors Kristi Jacobson and Lori Silverbush. Their film is a step towards a movement to begin to raise the issue of US government policy that they believe subsidises agribusiness at the expense of people in real need.

The trend to use film as a force for good is picking up. Check out http://goodwithfilm.com/

A couple of others I have seen lately I rate are Inside Job and Collapse - both confronting the recent global financial crisis in different ways.

So what are your top films that aim to achieve real change?

By John Drummond

Chairman, Corporate Culture