Jean Gebser (1905–1973), a German-born, naturalized Swiss citizen, is bestknown for his magnum opus The Ever-Present Origin
for - book - The Ever-Present Origin - Jean Gebser - to - youtube - The Integral Way of Jean Gebser with Jeremy Johnson - https://hyp.is/gnHv-izuEfCCBZObkKymvw/www.youtube.com/watch?v=YXf2jtl0ndc
comment - I hadn't heard of Gebser before and found this chapter difficult to understand - I found a good introductory video on Geber's work, especially the 5 stages and their meaning - Click on the youtube link above for a good introduction to Gebser's ideas