The Economist claims a world without lying would "would lead to disaster, for lying is at the heart of civilisation." Robin Hanson dissents:
Good lie detector tech might just bring us back to forager levels of social transparency. Clever gadgets which can read our micro expressions or subtle features of our tone of voice may just tell us the sorts of things that foragers could see because they studied the same few dozen folks their entire lives, and gossiped endlessly about their behavior and (poker-like) tells. For those of us now used to farmer and industry levels of social opacity, this transparency might take some getting used to. But it is likely well within the range of human adaptability.
The Dish 