David Low was the top British political cartoonist of the 20th century. Even if you think you don't know any of his work, you'd recognize his cartoon of Hitler and Stalin making nice after the signing of the Molotov-Ribbentrop Pact in 1939. My favourite Low cartoons are the ones he did in the late Twenties and early Thirties starring the figure of Peace. She's usually drawn as a young woman, healthy, modern and idealistic, sometimes shown gathering signatures on a clipboard, and often wearing a look of dawning awareness of the awful magnitude of her task. Here she is cycling an ice cream cart past an arms factory as the trucks of heavy industry roll out. You can explore a huge archive of Low's political cartoons here.