The key role of conflict as a key stimulant of the mind is investigated in later chapters of this web page. 

The two gate-keeprs of Narayana descended on Earth and became the source of conflict and suffering.  

It is our contention that the episode does not refer to the mundane conquest and grabbing of physical propety, wealth and life.   The intention is to introduce us to the fact that conflict has been introduced as an essential aspect of the Human thought process, by Hiranya and Hiranyaksha and their followers.

The conflict between the Rishis and Jaya and Vijaya was translated into the source of permanent conflict in the Human Mind.

Obviously this would not have been perpetrated unless it was absolutely necessary.  

Conflict, when administered in the appropriate dosage and for the  appropriate time, becomes the cause of change, which in turn is the primary ingredient of evolution. 

Conflict and its resolution are strong threads that runs right through the narratives in Srimad Bhagavatham.