Shantanu, you did not comment on this I posted.
I cannot tell from reading the article what the authors are providing as ‘evidence’ of biological basis for religion in human evolution as I cannot see the details of any beliefs that they have found correlations with particular brain interactions that were detected, nor on which part of the brain was involved in the process. Or are they just making a general observation that some brain activity is detected in those who belong to certain established religions. For me religion is any mental arrangement of ideas that derives a basis for living not from the realities of what the senses can detect of the outside world but of internal thought processes that are derived either from the genes or from another source. This takes place in the mind.
I personally subscribe to the view that religious ideas are not genetical in origin but derive from the consciousness that permeate the material world. This consciousness is inbedded into atoms and is therefore part of the evolution of the atoms into life forms. The Consciousness is powered and directed by God through His force called Paramatma. We as human beings are therefore connected to the universe and God through this mechanism that God has created. We are inseparable from it, just like all other organisms. We are a combination of gene-based body that has functions of maintaining itself and procreating and the consciousness element that is connected to the Supreme Creator God. There is therefore no distinction between us as humans, a biological species, and the universe. All that we do and how we do them are are monitored by God with whom we are separate but one at the same time. It includes the religions that we develop and adopt. How we develop these religions is therefore the fascinating question. How the connection of our body to God through consciousness has been made is through the human Mind. The Theory of Mind is therefore very complex and I believe is a magical creation through the impenetrable power of Gods Maya. Maya is the means God does things with that is beyond the capacity of humans to investigate using scientific tools, in this case, neuroscience.
My view is that the human mind can be compartmentalised conceptually as follows: the mind draws information from the ‘memory banks’ and from consciousness energy of matter to deal with stimuli received from the senses to get us to act in particular ways. When we have acted that information is registered again in the memory banks as updating information on our beliefs. The consciousness element evolves from the invisible forces that make the electrons and atoms behave in particular ways through chemical reactions to biological ones and finally in the evolution of the nerves and ultimately the human mind.
Significantly, the consciousness 'energy' of the universe is differentiated into gunas (properties/characteristics) of which there is a triad, three real deities that exist in consciousness, where Brahma (sattivic), Vishnu (rajasic) and Shiva (tamasic) sit in three corners of a triangle. In between these three major triad deities there is scope for millions of gods each one possessing a different blend of sattvic, rajasic and tamasic attributes. Each person is subjected to the guna consciousness energy stream as inputs into his or her mind. An individual however is attracted to only the god that is suited to his or her mental disposition so that he/she creates or adopts the myths and beliefs associated with that particular blend of attributes. A person is therefore creating his own god through an interaction with guna consciousness in a two-way process. It give each person his or her own rudder to guide his or her life. Even atheists have a god but of course they do not accept that a god is in fact guiding them. Over history particular gods get into prominence through interactions in society where their reputations are made. That is how religions always get formulated and propagated in human societies.
This represents the totality of the biological facts of our existence and the biological basis of religions.