We are in a global crisis, once again. This time the cause is an attack on the global trading system by the US President. …Where this trade war ultimately takes us is unknowable at this moment, but what is clear is that the postwar global system of liberalized trade and rules-based international commerce has been demolished at the whim of the President. A system built over 70 years was left in tatters in less than 70 minutes. …Shortly we will begin to know more about how the global economy responds to these tariffs, their impacts on prices and costs and supply chains, and the uncertainty they have caused for firms, workers, consumers and investors. The chaos unleashed by Trump’s “Liberation Day” tariffs in all likelihood means we are headed towards stalled growth if not an outright recession. …Canada cannot afford a business-as-usual agenda in a world turned upside down.