This volume contains the 43 papers written by close collaborators and friends of Ugo Montanari in celebration of his 65th birthday. In some sense, the volume is a reflection, with gratitude and admiration, on Ugo’s highly creative, remarkably fruitful and intellectually generous life, which is thriving as strongly as ever. It provides a snapshot of the manifold research ideas that have been deeply influenced by Ugo’s work. In a sense the book gives a vantage point from which to foresee further developments to come: by Ugo himself, and by many other people encouraged and stimulated by his friendship and example.