Carl Ritter (August 7, 1779 – September 28, 1859) was a German geographer. Along with Alexander von Humboldt, he is considered one of the founders of modern geography. From 1825 until his death, he occupied the first chair in geography at the University of Berlin.
Paul Vidal de La Blache (French pronunciation: [pɔl vidal də la blaʃ], Pézenas, Hérault, 22 January 1845 – Tamaris-sur-Mer, Provence-Alpes-Côte d'Azur, 5 April 1918) was a French geographer. He is considered to be the founder of modern French geography and also the founder of the French School of Geopolitics. He conceived the idea of genre de vie, which is the belief that the lifestyle of a particular region reflects the economic, social, ideological and psychological identities imprinted on the landscape.