Monopoly: Good or bad?

Thanks to tutor2u for raising issues from both sides of the argument
http://www.tutor2u.net/economics/blog/innovative-monopolist-vs-defensive-monopolists-monopoly-power-in-the-united-arab-emirates?utm_medium=email&utm_campaign=Economics%20daily%20digest%20Wed%2027th%20April%202016&utm_content=Economics%20daily%20digest%20Wed%2027th%20April%202016+CID_bb0658a068807a2d435193512bb2132f&utm_source=CampMonitor&utm_term=Innovative%20Monopolist%20vs%20Defensive%20Monopolists%20Monopoly%20Power%20in%20the%20United%20Arab%20Emirates%20We%20often%20champion%20monopolies%20for%20their%20dynamically%20efficient%20behaviour%20and%20how%20they%20contribute%20to%20long%20run%20static%20efficiencies%20through%20their%20invention%20and%20innovation%20made%20affordable%20by%20high%20profits