1568-1652 1872-1945 1881-1937 1902- 1902-1979 1947- 20thcentury agrell aspectsocial authors biography borgen bure civilization cruijff cruyff culture cultureconflict educators galtung germany hendrikjohannes history huizinga interviews jeu leisure loisirs magic nationalsocialism netherlands norwegian numerology occultism pacifists peace peacemovements play runes sigurd soccercoaches soccerplayers socialaspects studyandteaching