I just heard that the improvisation guru Keith Johnstone (1933 – 2023) passed away. He visited Stockholm occasionally and worked with Susan Osten and others, which also meant that his work was translated and published in Swedish. I think his work was absolutely fundamental to bridge the world of games and theater and thereby making what we now know as nordic live action roleplay possible. The book Impro: Improvisation and the Theatre (1989) helped me and many other larp organizers and participants in late 90ths to understand social status in play, masks and physical improvisation, as well as basic ideas about what kind of improvisation that enables collective storytelling in a group of participants.