Leopold "Leo" James Maxse (11 November 1864 – 22 January 1932) was an English amateur tennis player and journalist and editor of the conservative British publication, National Review, between August 1893 and his death in January 1932; he was succeeded as editor by his sister, Violet Milner. He was the son of Admiral Frederick Maxse, a Radical Liberal Unionist, who bought the National Review for him in 1893. Before the Great War, Maxse argued against liberal idealism in foreign policy, Cobdenite pacifism, Radical cosmopolitanism and, following the turn of the century, constantly warned of the 'German menace'.