b'crashes? The moment fish are spotted swimming back up commerce-free canals in Venice? The moment before protest erupts? The moment global population peaks? Or, as Gregg Easterbrook wrote in A Moment on the Earth, the juncture at which a profound positive development of history began: the moment when people, machines, and nature began negotiating terms of truce? 1Fish are back in the canals. On March 19, 2020, BBC talk show host Stephen Sackur had the following exchange with Laurence Boone, chief economist of the Organisation for Economic Co-Operation and Development:Sackur: When the coronavirus crisis is over, what will we have learned about globalization? Globalization as weve known it in the 70s, 80s, 90s and into the 2000sit doesnt look sustainable going forward.Boone: When we get out of this, there will definitely be a large amount of thinking and revision about the way the world has been functioning economically over the past decades. . .Sackur: There is an extraordinary thing that has happened since the coronavirus crisis really hit the world economy. We have seen a phenomenal improvement in the air quality that has been recorded in China. Weve even seen fish coming back into the canals in Venice. . .Boone: I think the shock is so big that we will learn a lot of lessons. . .You are very right to point at climate. Reduced biodi-versity with climate change may also be responsible for how fast the virus may have spread. . .This will lead us to rethink some of our economic model.1 A Moment on the Earth, Gregg Easterbrook (Viking, 1995), p. 6988'