The Covid-19 pandemic of 2020 triggered what may have been the fastest economic downturn in history. Overnight, government-imposed lockdowns caused whole sectors of the economy to shut down. Trade halted and supply chains were disrupted. Some trends that were already under way, such as the move to online shopping, accelerated sharply. So, the economy that emerges after Covid-19 passes may be irrevocably changed. Some jobs that have been lost may never come back, though others are being created.