Cremer established the International Arbitration League in 1870. He initiated an arbitration treaty between Great Britain and the USA. Cremer organized and promoted inter-parliamentary peace conferences, and he was editor of the journal "The Arbitrator". He was the only labor leader in the peace movement. Cremer was also one of the founders of the Inter-Parliamentary Union.
Member of the Permanent Court of Arbitration at the Hague
Schönbrunn wanted the Norwegian Nobel Committee to bestow an honorary peace award on Czar Nikolai II of Russia for his initiative that resulted in the 1899 Hague Peace Conference. In addition, Schönbrunn wished that the Nobel Committee would divide the prize money between some worthy peace workers, namely William Randal Cremer, Frédéric Passy and Bertha von Suttner.
Lange did not include this nomination among the official nominations. However, Schönbrunn was a memeber of the Arbitraion Court at the Hague and he was thereby entitled to nominate a candidate for the peace prize.