Robert Sutton wrote a book about this. https://en.wikipedia.org/wiki/The_No_Asshole_Rule https://en.wikipedia.org/wiki/The_No_Asshole_Rule Edit: Interestingly,

Robert Sutton wrote a book about this. https://en.wikipedia.org/wiki/The_No_Asshole_Rule https://en.wikipedia.org/wiki/The_No_Asshole_Rule Edit: Interestingly, depressed people can also bring down team morale.