Australian: CLIVE Hamilton has considerable drawing power among the reading public, but will a book about non-religious spirituality based on the premise that we need to be good for goodness’s sake walk off the shelves? Professor Hamilton took to the airwaves yesterday morning to talk up his latest offering, The Freedom Paradox: Towards a Post-secular Ethics. He explained to Radio National Breakfast host Fran Kelly that despite a surfeit of material possessions, people were unhappy and …