It would combine knowledge and regulation to “internalize the externalities” of the market system, so that the price of a product would reflect the full costs (including all environmental and social side effects) of making that product. This is a measure every economics textbook has called for (in vain) for decades. It would automatically guide investments and purchases, so people could make choices in the monetary realm that they would not later regret in the realm of real material or social worth.

