Abstract: The article shows that the Russian question was at the heart of John Maynard Keynes' concerns at the beginning of his career. As a Senior Treasury official during the First World War, he proposed an original monetary reform to facilitate the Allies' intervention in Northern Russia. He wondered about the reasons for the Russian revolutions of 1917 and meets Lydia Lopokhova. It was on the sidelines of the Genoa Conference in 1922 that Keynes best revealed his high level of expertise in the Russian case.