What is the author's voice and where the hell is it living?

I was invited last October by the Australian Society of Authors to speak at their national congress on the role of writing, journalism and being an author. The video has just been posted (!):

Much modern publishing is based on a commercial model, and has relied on authors to deliver sales and profits. Yet authors are also seen as important contributors to culture and education. A further identity – that of speaking truth to power – sees authors consciously take on activist tasks through their work.
Science journalist and NSW Writers Centre Executive Director Jane McCredie led author Susan Johnson and journalist Antony Loewenstein in discussion.
This discussion took place as part of the ASA National Writers’ Congress on Friday 18 October 2013 in Sydney.