i never said that people will magically become nice and equal, i said that people will work together in order to survive..
But IMO it would take magic to make people behave as you say for anything except the immediate aftermath of any cataclysmic event.
And i disagree that somebody will gain leadership by force or other means as its harder for these people to gain support when faced with low numbers, as everyone relies on each other for survival so therefore are unwilling to risk theor lives or their families.
I can't see any logic in that argument at all. Less people means less competition for the leadership. And going back in history to when the population was only 10% of the current (not sure exactly when but more recent that you think) the species still managed to get into a few right old tear ups.