Panellists: Peter Garrett, Minister for Environment Protection; Peter Singer, philosopher and ethicist; Helen Coonan, Liberal Senator; David Marr, author and journalist; and Jayashri Kulkarni, professor of psychiatry.

Panellists: Bill Shorten, Parliamentary Secretary for Disability Services; Barnaby Joyce, National Party Senate Leader; Christine Wallace, political biographer and journalist; Magda Szubanski, actor and comedian; Harold Mitchell, advertising guru and philanthropist; and Janet Albrechtsen, columnist for The Australian.