Grab your tools, we’re going digging. The May issue of ArtReview seeks out the in-betweens, the what-ifs and the all-at-onces: the spaces that can be carved out to make way for creative reimaginings.

As many mourned the passing of Muhammad Ali last week, a University of Minnesota student from the 1960s looked back with admiration on the role his humanitarian efforts played in their activism. The ...