What Makes an Artist ‘Great’?

I’m wondering about Yoko Ono

Yoko Ono performing Cut Piece in 1965. Photo: Minoru Niizuma

A couple of weeks ago I went to see the Yoko Ono exhibition at Tate Modern in London. I’ve been putting off writing about it because, well, I didn’t quite know what to say. It is a huge show spanning a prolific creative life over more than fifty years, and frankly any contemporary artist that has a retrospective of this size in one of London’s biggest public art…