Master mediator William Ury dissects Michelangelo's 500 year old letter to the Pope, a powerful example of how saying No can lead to a wiser Yes. The letter, recently circulated by the inspired Maria Popova of Brainpickings.org, contains wisdom that can be applied to our professional and personal lives today. Ury even ties its insights into his mediation of the longest-running war in South America. Get ready to say No more often in 2016 - Positively.