Jan Groenveld's work (especially her summary paper on social psychology and group dynamics in cults) was for me an important eye-opener and the text still informs the Finnish speaking audience.
JanG was one of those big hearted and loud people whose positive message could be heard on the other side of the globe.
She was a grandmother. I hope her family can cope with their sorrow. I share a bit of it here in Finland.
requiescat in pace
Achan Beroean