I found myself wondering if I could name ANYONE who had done more fundamental damage to human culture, and so far I have failed. Calvin developed and propagated a philosophy that ENCOURAGED its adherents to work themselves to death, and he did so with such success that his toxic ideas have influence the entire planet, not just his odd little cult.
So let's hear from you. My vote for the most evil person in history currently goes to Mr. Calvin. Can anyone name (and defend) anyone more qualified for the title?