Reproductively adapting as displaced replacing previous generations with the opportunity to add another generation gap before dying.
Obeying social consensus restricting generation gaps to defending ancestral social consensus established historically so far keeping truth to character more important that survival of the species characteristics going another generation gap forward each rotation of the planet ancestries are never same population left next rotation of the planet generation gap population is constantly changing forms becoming part each gap or not really depending on what last generation arriving does cradle to grave as all previous did since arriving one at a time.