The Alantropa plan does sound absurd today to many, but in the 1920s, it was taken seriously by engineers, politicians, architects, and even the United Nations, at one point. There were hundreds of articles in the German and international press supporting the project, and currently, thousands of publications and lectures about Alantropa can be found in a special section in the archive of the Deutsches Museum in Munich. The grandiose plan involved partially draining the Mediterranean Sea and uniting Europe and Africa into one supercontinent. German architect Herman Sörgel, who was the brain behind the project, believed his plan was...