The son of the conductor, choirmaster and composer Eusebius Käslin and brother of the writer Hans Käslin graduated from schools in Aarau, most recently the canton school until 1892 . He then studied law at the Universities of Bern , Munich and Heidelberg . After completing his doctorate , he was admitted to the bar of the Canton of Aargau and from 1900 worked as a clerk at the Baden District Court , at times also as an editor of the Aargauer Tagblatt .
In 1902 Käslin joined the federal administration and was adjunct in the Justice and Police Department until 1911 . From 1912 to 1914 he was secretary of the second commission of experts for the criminal code . In 1914 he moved to the police department of the Justice and Police Department, which he headed from 1918. In 1919 the Federal Council elected him Vice Chancellor for the German language.
After the unexpected death of Chancellor Adolf von Steiger , Käslin was elected as his successor by the Federal Assembly without opposition. Since the Catholic-Conservative People's Party had had a second Federal Council seat since 1919, this time it refused to run against it. In the area of state affairs, Käslin is considered a pioneer in public relations , as he was the first head of the Federal Chancellery to organize regular meetings with the press. In March 1934 he had to resign for health reasons, and three months later he succumbed to a heart condition.
- Biographical Lexicon of the Canton of Aargau 1803–1957 . In: Historical Society of the Canton of Aargau (Ed.): Argovia . tape 68/69 . Verlag Sauerländer, Aarau 1958, p. 424-425 .
- Sarah Brian Scherer: Robert Käslin. In: Historical Lexicon of Switzerland .
- Biography on the website of the Federal Chancellery
|BRIEF DESCRIPTION||Swiss Federal Chancellor|
|DATE OF BIRTH||November 14, 1871|
|PLACE OF BIRTH||Aarau|
|DATE OF DEATH||July 3, 1934|
|Place of death||Bern|