Hidden riddle with prize

Hey all, I wanted to see if anyone can decipher this riddle. Found a picture with this riddle hidden on my university campus, supposedly if I decipher it I win 100 dollars. So can anyone help me out?

"A necessity by all rights,
that which drives us all to pursue it,

I grow stronger with each
kindness and spread
faster than wildfire on
the great plains.

Ignorance may be bliss
but I am the feeling true."


WHAT AM I


and thats it, thanks for any and all help.