Is sanity rational?

[Aoi Magi]

Sanity is a perception of a behavior which matches the norm of the society at that point in time. Rational behavior on the other hand, is the behavior which leads to the survival of our "replicating structure"(for a lack of better term). The closer that structure is to our own while having greater potential adaptability than our own, the greater is our priority to ensure it's survival. That is why self-sacrifice to protect our children, country or species is rational, whereas suicide is irrational.