During some spare time on a recent lecture tour to Michigan State University, I took a spontaneous decision to stroll from my hotel across campus to the Eli and Edythe Broad Art Museum, designed by Zaha Hadid. Though I was aware of her reputation as a major, award-winning architect of the 20th and 21st centuries, I had never focused on her work properly before. But sitting in that space, overlooking the monumental floating staircase and looking …