Felix von Luckner was a romantic hero of World War I, a dashing nobleman who commanded one of the last sailing ships to fight in war. In this week's episode of the Futility Closet podcast we'll describe Luckner's uniquely civilized approach to warfare, which won admiration even from his enemies. We'll also puzzle over how a product intended to prevent drug abuse ends up encouraging it. Sources for our feature on Felix von Luckner: Lowell Thomas, Count Luckner, The Sea Devil, 1928. Edwin P. Hoyt, Count von Luckner: Knight of the Sea, 1969. In all, Seeadler captured 16 ships totaling 30,099 tons between Dec. 21, 1916, and Sept. 8, 1917. This week's lateral thinking puzzle was contributed by listener David White, who sent these corroborating links (warning -- these spoil the puzzle). You can listen using the player above, download this episode directly, or subscribe on iTunes or via the RSS feed at http://feedpress.me/futilitycloset. Please consider becoming a patron of Futility Closet -- on our Patreon page you can pledge any amount per episode, and all contributions are greatly appreciated. You can change or cancel your pledge at any time, and we've set up some rewards to help thank you for your support. You can also make a one-time donation via the Donate button in the sidebar of the Futility Closet website. Many thanks to Doug Ross for the music in this episode. If you have any questions or comments you can reach us at firstname.lastname@example.org. Thanks for listening!