For more than 35 years he has been active in the peace movement and for over 25 years he has been a member of IPPNW. Krämer co-founded the IPPNW working group “South-North”(Süd-Nord). His work includes the IPPNW Report Body Count –Casualty Figures after 10 Years of the “War against Terror” advocating an end to this war.