Once upon a time the world was full of rainbows and sunshine.
And everyday, all manner of creatures would bask in the sunshine as the rainbows filled them with joy and happiness.
Until one day clouds began appearing and the rainbows started to fade and the sunshine became partially hidden by a cloudy sky.
And because of this all the creatures started to slowly learn about fear and uncertainty.
And because of this the world plunged deeper and deeper into the darkness of the shadows.
Until finally the rainbows vanished and the world became full of fear and terror.
And ever since that day only the strongest of creatures become resistant enough to adapt and survive.