Summary: It sounds like an oxymoron: Positive Conflict But Dr. Nate Regier, a former practicing psychologist, has built a successful second career as an author, business coach, and popular keynote speaker teaching business people how to fight productively – both on the job and at home. With endorsements from management gurus including Dan Pink, Ken Blanchard, and Marshall Goldsmith, Nate’s book, Conflict without Casualties, has become must-reading in boardrooms and business schools across the country.