Klas Pontus Arnoldson (27 October 1844 – 20 February 1916) was a Swedish author, journalist, politician, and committed pacifist who received the Nobel Peace Prize in 1908 with Fredrik Bajer.

Arnoldson became the railway clerk and rose to the post of stationmaster in the year 1871 to 1881.

He attempted to shape the public opinion of both Norway and Sweden in favour of peaceful settlement.

He also wrote journalistic pieces such as "Is World Peace Possible?

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