Robinson drew on the philosophy of existentialism and especially the writings of the German-American, Paul Tillich.

BBC: God The Father by Giovanni Battista Cima

Its artistic roots lay in surrealism, its philosophical ones in existentialism, even though Debord spat on both.

ECONOMIST: May 1968

Paul Jennings on existentialism (sadly not included in Mr Gross's anthology) is easily the equal of Jonathan Swift on anything.

ECONOMIST: More than mere emulation

This was the core of Sartre's existentialism.

ECONOMIST: Jean-Paul Sartre