I think all the debauchery was a symptom of the corruption in their hearts not the cause of the empire fall. They didn't decide one day to this and that and the empire fell. They got increasingly corrupt and as the corruption and rejection of God and moral values increased, the debauchery took that empty place in their life. Debauchery is a symptom that corruption and rejection of God have gotten to the maximum levels.
Edit: Corruption is always the cause of fall. So even 'conservatives' need to be careful and mindfull of corruption among us.
I think all the debauchery was a symptom of the corruption in their hearts not the cause of the empire fall. They didn't decide one day to this and that and the empire fell. They got increasingly corrupt and as the corruption and rejection of God and moral values increased, the debauchery took that empty place in their life. Debauchery is a symptom that corruption and rejection of God have gotten to the maximum levels.