Flourishing of the Arts is a social policy in Civilization V. It is part of the Aesthetics tree and requires Cultural Centers and Fine Arts. When the right basis has been laid, cultural development in a society could become spectacular enough to usher in a Golden Age. With this Policy, great inspiration comes to all your citizens, whether they dabble with culture or not. This effect is particularly strong in cities which have constructed amazing buildings, which can serve as inspiration for the artists to really outdo themselves.