graphology and psychiatry in the 1905 book Les ecrits et les dessins dans les maladies mentales et nerveuses.

After World War I, interest in graphology continued to spread in Europe and the United States. In Germany during the 1920s, Ludwig Klages founded and published his findings in Zeitschrift für Menschenkunde (Journal for the Study of Mankind). His major contribution to the field can be found in Handschrift und Charakter.