Pepe Karmel argues that we are now in the midst of a golden age of abstraction and suggests that linear analysis is no longer an effective method of evaluating abstract art. Instead, Karmel suggests the adoption of a super-set of "thematic" categories: "Three respond to nature: cosmologies, landscapes, and anatomies. And three respond to culture: fabrics, architecture, and signs. These categories are not mutually exclusive."
Karmel concludes: "Ultimately, the evolution of abstract art—like the evolution of modern art more broadly—has been a series of responses to the experience of life in the 20th and 21st centuries."