The Walker Art Center’s “Brave New Worlds,” curated by Doryun Chong and Yasmil Raymond, features twenty-four artists from around the globe and presents artistic practice as a means of exploring place and time in a world flattened by digital technologies, spectacle, and “free trade.” Like Jorge Macchi’s Liliput, 2007, included in the show, in which national boundaries are cut apart and reconstructed into unfamiliar continents through chance correspondence, “Brave New Worlds” features artists from countries that are geographically distant from one another, but whose cultures, economies, populations,