This excellent talk was given at the SWP's Marxism festival in 2011 by Richard Wilkinson. He co-authored The Spirit Level with Kate Pickett, and was published in 2009. It's an excellent read that proves time and again that equality leads to better, healthier, more secure, and more trusting societies. And that even the mega rich in more equal societies have a better standard of life than the mega rich in unequal countries. If you find this video interesting I very much recommend the book.