In recent years, Clark has been noted especially for its geography and psychology departments, with the latter having a distinctive humanistic orientation. The School of Geography was founded by then President Wallace Walter Atwood in 1921, and is the first institution in the United States established for graduate study in this science. It has granted more doctoral degrees than any other geography program in the country. The geography department is best known for its strength in human-environment geography and for the development of the IDRISI geographic information systems software, named for the famous 12th century explorer and cartographer Muhammad al-Idrisi by Prof. Ron Eastman. It was ranked #1 for undergraduate geography by "Rugg's Recommendations on Colleges" and has consistently been ranked in the top 10 in the nation by other publications. The geography department also offers a graduate-level degree in GIS as part of the Fifth-Year Free program. The department's mission is ambitious: "to educate undergraduate and graduate students to be imaginative and contributing citizens of the world, and to advance the frontiers of knowledge and understanding through rigorous scholarship and creative effort."