Angus Lindsay Ritchie Calder (5 February 1942 – 5 June 2008) was a Scottish writer, historian, and poet. Initially studying English literature, he became increasingly interested in political history and wrote a landmark study on Britain during the Second World War in 1969 entitled The People's War. He subsequently wrote several other historical works but became increasingly interested in literature and poetry and worked primarily as a writer, though often holding a number of university teaching positions. A socialist, he was a prominent Scottish public intellectual during the 1970s and 1980s.