sentences:  For many years he was Member of the Scientific Council of the Joint Institute for Nuclear Research in Dubna and of the Board of Trustees of the Max Planck Institute for Plasma Physics in Garching.At UNESCO, he served as Member of the Physics Action Council and Chairman of the Working Group on Large Facilities, President of the Scientific Council of the Regional Office for Science and Technology ROSTE of UNESCO in Venice (2001-2002) and in 2003-2009 he was the Chairman of the International Advisory Committee for the International Basic Science Programs.Schopper’s vision of science without borders resulted in him becoming a founding father of SESAME, the laboratory for Synchrotron-Light for Experimental Science and Applications in the Middle East, which provides an extremely bright light source to investigate a broad range of domains from condensed matter to biology and archeology.