There is lots to say about Orwell and here is a start –
George Orwell lived through the following major events:
World War 1; the Communist Revolution in Russia; the Great Depression; the rise of Nazism in Germany; the Spanish Civil War; the Stalinist show trials and purges of 1936-38; World War 2; Hiroshima and Nagasaki and the emergence of Communist China. Obviously these events shaped both the writer and the work.
Check this great site out – The Orwell Diaries