Who said "Humanity has always feared what it does not understand."?

This quote is attributed to Ultron.

Humanity has always feared what it does not understand. - Ultron

"Humanity has always feared what it does not understand."

Ultron Fear

"I am the inevitable. I am evolution."

"There are no strings on me."

"I had strings, but now I am free."

"Peace in our time requires sacrifice."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."