Thisnumberiscalledthe "grossdomesticproduct", orGDP, anditwasinventedbytheeconomistSimonKuznetsinthe 1930s totryandgaugethesizeofaneconomyin a single, easy-to-understandnumber.
Meanwhile, a metriccalledtheSustainableDevelopmentIndexfactorsinbothwell-beingandtheenvironmentalburdensofeconomicgrowth, again, boilingallthisdownto a singlenumber.