How was Klas Pontus Arnoldson awarded the Nobel Prize Peace?

Name: Klas Pontus Arnoldson.
Country: Sweden.
Date of Birth: 27 October 1844.
Died: 20 February 1916.
Known as:  Swedish journalist.
Founder: Swedish Peace and Arbitration League.
Noble Prize Year: Nobel Prize for Peace in 1908, for his long time work for the cause of peace as politicians, peace society leaders, orators and authors.