I had a former employer do a mandatory Sean Delaney-led session for thousands of employees. I found it to be quite good, but much of our dysfunction was at the

I had a former employer do a mandatory Sean Delaney-led session for thousands of employees. I found it to be quite good, but much of our dysfunction was at the leadership level (directors stabbing each other in the back, etc.), and leadership—despite also attending the sessions (management had even more training, IIRC)—quickly reverted to the same toxic habits.