This volume explores the enduring influence of Introduction to the Science ofSociology, published a century ago by Robert Park and Ernest Burgess. It bringstogether scholars from the United States, Canada, and Italy, who collectivelydemonstrate the work's enduring relevance and its important role in the dialoguebetween European and American sociology. The contributors examine topics raisedin the original text that remain as relevant as ever, including segregation, the conceptof assimilation and the marginal man, subcultures, constructive isolation, collectivebehavior, the German roots of the Chicago School, socio-spatial evolution overtime, fashion and metropolis, and social creativity from the ecological school to thedigital challenge.