Where's everyone going?

Many leaders/managers wonder why so many of their employees leave so soon and so fast. Some believe, it is just the industry they are in, high turn over, burnout. Some just say it wasn't the right fit for these particular employees. I wonder if managers ever think, "I wonder what role I played in their desire to leeave?!" Probably few as many managers place the blame, instead of taking the blame. I believe, no matter the industry an effective manager can keep happy employees. My other inqiry would be whether or not the treatment of those left are considered, especally when you have the qintessential bad manger. Are they just always left wondering... Where is everyone going?