Shibboleth by Doris Salcedo, installed in Tate Modern Turbine Hall, was a dramatic fissure carved into the museum’s concrete floor. The work split the vast space with a long, jagged crack, confronting visitors with themes of exclusion, borders, and the invisible divisions that shape societies. Through this seemingly simple rupture, Salcedo gave physical form to the histories of displacement and inequality that often remain unseen.