Was perhaps from the moment that Monsterkind were hurled down Mt Ebott like trash that W.D. Gaster knew humans were rotten creatures? Or maybe it was instead during the war when he had been but a young child. Forced to flee from all he's ever known as battle raged across lands, then later as he grew up to create weapons of mass destruction. Perhaps, it was before he was even born that he had know this truth. Gaster was, after all, one of the smartest monsters to have ever lived, and most certainly was the smartest monster in the Underground.
Because humans were dangerous, after all. They were miserable, miserable creatures that were powerful yes, but miserable.
And his next invention would be the bridge to that gap between their two races. No. Rather then gap it was a chasm.
He would create the first biological weapon, and once the barrier was destroyed then nothing would get in its way.
All I hear is screams. All I smell is blood. All I see is decapitated bodies. Up here on the surface, it's never safe. No matter where you go, no matter where you hide, you'll be found and killed. All my life has been surviving. Ever since I was born, I was born into a world where if you were one of the weak, you'll be killed. You have to be strong in order to survive on this messed up planet.
People began to lose faith in humanity. People began to lose hope. There's no good soul on this planet anymore. Well, not any that's alive. Those people were killed without hesitation. It seems evil has won over good. Evil is now ruler of Earth.
{Story also on Quotev}