Dennis Duncan is the author of Index, A History of the (Allen Lane).
As the Hungarian-American artist celebrates his 80th birthday, is his brand of conceptual art still as radical as it once was?
The Polish-born artist’s paintings and drawings may have an air of the doodle, but her politically radical work is thrillingly inventive
A photo taken by the artist in 1979 arranges the documents of a family’s life in humorous – and radical – style
