Who said "I alone have the will to act."?

This quote is attributed to Thanos.

I alone have the will to act. - Thanos

"I alone have the will to act."

Thanos Leadership

"I am inevitable."

"The hardest choices require the strongest wills."

"Perfectly balanced, as all things should be."

"You should have aimed for the head."

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"