“When social critics deplore the materialism of our time and its preoccupation with money, fame, and superficial values, they overlook that the driving force behind the changes we have seen -- one of the greatest periods of change in history -- has been thought. It wasn't big bucks or social status that drove this change. It was, and is, the force of the play of the mind. As materialistic as we may be, playful thinking got us here.”