The article introduces the Symposium on “Marshall Sahlins’s ‘Stone Age Economics’, a Semi-Centenary Estimate”, with contributions by Chris Gregory, John Gowdy, Nicholas Xenos, James Carrier, Philippe Chanial and Ilana Silber, Pol Llopart i Olivella, Karen Ho, Osvaldo Raggio, Sacha Bourgeois-Gironde, Sergio Cesaratto and Stefano Di Bucchianico, Giuseppe Danese, Veronica Barassi, as well as by Marshall Sahlins himself.