The number one strongest aspect of humanity is their ability to imagine that which does not exist. A classic example would be furries.
Long long ago, humans saw lions and they imagined a new lifeform. A human with a lion's head, the lion man. This creation was immortalized over 40,000 years ago due to the revolutionair who carved a statue of it. This is basically one of the first known instances of human imagination. The ability to think up something that most certainly doesn't exist.