One thing we know about the world after the Covid-19 pandemic has been brought under control -- it's going to be different from the one before the global coronavirus outbreak. Some of the biggest changes will be in the world's workplaces, about which Dr. Jim Harter has been asking questions and collecting answers for the Gallup Organization. Why are so many workers opting out of their jobs? How can employers bring them back... and then make them happier and more productive?