@RW Standing,
I didn't realise the genetic drive to procreate was an 'institution', nor that marriage was part of being human (rather than being an institution that was created from being human). Humanity isn't about institutions - institutions are merely societies attempts to formalise humanity.
I can't see how morality has any more or less bearing on survival than it did previously...exept that morality can these days be magnified by other factors, like atomic bombs.
The sanctity of life is rubbish when it extends to robbing dying people of their dignity, and forcing them to endure torture. In regards to other forms - humanity has survived and still been viewed as human even when sanctity of life didn't exist as we know it today. In fact many of the most famous people in history, who could be regarded Titans of history, could also be regarded as mass murderers : Caesar, Alexander the Great, Napoleon, Attila the Hun, Gengis Khan etc.
So far I haven't seen much about humanity, but rather, mostly about ideology.