My painting hero, and Father of Abstract Expressionism, Wassily Kandinsky was a concentric painter. He introduced the open loop, which to him symbolized both the universe and the human soul. Concentrics have a long human history symbolizing positive spirituality.
I ascribe these other meanings to concentric circles: "1) Social Focus and 2) elimination of discrimination of all types- racial, religious, gender, sexual, cultural and all other stereotypes. When you consider that perhaps as many as 90% of all human killings that occur on earth come about from the hate related to discrimination."