What is collective memory and how do societies remember?

The answer

Collective memory, a concept introduced by sociologist Maurice Halbwachs, describes how groups construct and maintain shared narratives about the past that shape present identity. It differs from history in that it is selective, emotionally charged, and serves current social needs. The Japanese and Chinese have fundamentally different collective memories of World War II. Americans' collective memory of the Civil War varies dramatically by region. Research has demonstrated that collective memories can be demonstrably false: the 'Mandela Effect' describes shared false memories (like many people 'remembering' Nelson Mandela dying in prison). Nations maintain collective memory through monuments, museums, national holidays, school curricula, and media. Studies show that collective memory typically crystallizes around the experiences of people aged 15 to 25, known as the 'reminiscence bump,' meaning each generation's formative events shape their national narrative for decades.