"Turning my back on Malcolm," says Muhammad Ali 40 years after the fact, "was one of the mistakes that I regret most in my life." To his credit, Ali has come to grips with this tragic misstep ...

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.