100 years since world war 1
It seems to me that Homo Sapiens have become Human, through intelligence that no other animal on earth has ever had.
The reward for this intelligence is to be so inquisitive, that they learn more and more about the world.
As they learn about the world they Create Religion to explain the unexplainable, and through this learning and religion, they hate others more and more because of their views of the world differ to their own.
The increase in knowledge and intelligence causes divides between peoples, and creates nations that then split.
Then wars between these nations begin, which drives each side to gain the upper hand on the other.
They seek more knowledge to create bigger and worse weapons than ever before.
These nations then have bigger and bigger wars, until the threat of a war is enough to stop a war itself.
Then finally stalemate and a decision by Humanity is needed.
Do Humans become intelligent enough to leave wars behind them forever or does that war finally happen.
Then the price of being the most intelligent creature ever to have existed on this earth, is to potentially have a war that wipes everything off the face of the planet.
Maybe this is why, no intelligent life from outer space has ever reached Earth.
Maybe to achieve that level of space travel, intelligent life would need to be so advanced that it never happens.
Maybe Intelligent life wipes itself out before it gets to that stage of evolution.
Thus the price of Human Intelligence maybe to realise what we are, and destroy everything we have ever been.