Hereditary Causes: Building CB-ROMs helps a person to engage with others in a better way to reap benefits social interactions can offer, but is not critical for survival and reproduction. In other words, if a person does not have the capacity to see from other people's point of view, it is not a threat for his survival and reproduction the way, e.g., breathing is. Based on the same, the necessity, and thus, the inherited strength
(more under title Inherited Strength) of building CB-ROMs is not very strong.
For the same reason, and the reason that the need to consider other people's points of view is different for every person, which is based on his dynamically changing circumstances, the software for building CB-ROMs is hard-wired as third type of interactions
(more under title Hard-Wired Interactions), which need to be activated to a level required by them. The level of activation is based on how intelligently a person processes experiences under his circumstances.
As the capability of building CB-ROMs develop in childhood, when a child is in a situation that does not necessitate their usage, it results into weak CB-ROMs, which also results into inherited strength of building them in following generation weaker.
In detail: If interactions in the current generation that require usage of CB-ROMs (i.e. seeing from another person's point of view) do not trigger activating the building process, which depends on 1) Intramural processing (which is based on VP, which uses personal B-ROM, i.e. past experiences and future projections) and 2) inherited strength of building CB-ROMs that was passed on from his previous generation, the strength to build CB-ROMs that will be passed on to the next generation will decrease
(more under title Modifying Hard-Wired Interactions). When the same happens over generations, it results into cascading effect.
In other words, it is possible that, due to non activation, lesser inherited strength to build CB-ROMs in the current generation will result into VP assigning lesser importance to build them, thus decreasing the strength to be passed on to the following generation, resulting into VP assigning even less strength to build them in that generation, and so on for the following generations. Such cascading effect can result into related populations with less inherited strength of building CB-ROMs, as can be seen in certain families and clans.
With no or weak CB-ROMs built as a result of the above, the person is unable to consider other people's points of view, resulting into "none for all" utilization pattern
(more under title CB-ROM Utilization), impairing his social interactions, as seen in those with autism. As inherited strength is a hard-wired phenomenon, the above can be correlated with information in DNA, attributing genetic basis to the phenomenon (besides genetic mutations).
It is also possible that, due to low inherited strength to build CB-ROMs, a person may realize to build them after he passes the usual developmental age of building them, resulting into slow development of CB-ROMs, which is also seen in some autistic patients.