David Alegre Lorenz (Barcelona, 1975) is a historian and professor of Contemporary History at the Autonomous University of Barcelona. A specialist in the military and social history of war, he has researched the experience of Spanish soldiers on the Eastern Front during World War II and the impact of violence on society. He has published several books and articles on these topics, highlighting his work in the field of the Blue Division. He is a recognized expert in 20th-century history, particularly in armed conflicts and their social and political consequences.