Just got curious is all. Many studies show secularism spreading deep in modern culture. This could be linked to multiple environmental and cultural factors in society today.
While not directly comparable, do we have any conclusive knowledge of just why the scales tipped towards reformed practices during the end of the Sadducees and rise of Karaism?
EDIT: crap I missed a word from the title
What do you mean with "secularism" and what do you mean with "reformed practices"? What is "modern culture"? What does all of it have to do with the Karaism et al.?
5th-6th century CE mesopotamia belonged to the Persians who may have contributed to the flourishing of thought which has been more in line with theirs (not the Sadduccees.) What could have contributed to the rise and the decline of Karaism is the rise and the decline of the Khazars.