David Ritter is the Chief Executive Officer of Greenpeace Australia Pacific.

Chloe Hooper’s first novel, A Child’s Book of True Crime, was shortlisted for the Orange Prize for Fiction and was a New York Times Notable Book. The Tall Man, her non-fiction account of the death in custody of Cameron Doomadgee, won many literary awards. Chloe’s latest novel is The Engagement, published in 2012.

Sally Warhaft is a Melbourne broadcaster, anthropologist and writer and the host of the Wheeler Centre’s live journalism series, the Fifth Estate, now in its sixth year. She is a former editor of the Monthly magazine and the author of the bestselling book Well May We Say: The Speeches that Made Australia.

Peter Doherty shared the 1996 Nobel Prize in Medicine for discovering the nature of cellular immune defence, and continues to be involved in research directed at understanding and preventing the severe consequences of influenza virus infection. He was Australian of the Year in 1997, and has since been commuting between St Jude Children’s Research Hospital in Memphis and the Department of Microbiology and Immunology at the University of Melbourne.

He is a huge advocate for evidence-based reality in areas as diverse as childhood vaccination, global hunger and anthropogenic climate change. In an effort to communicate more broadly, he has published four books for general readers. The Knowledge Wars is the latest.