Atheists who changed the world

[Shell B]

I am trying to do something that I think might be a great idea. However, it is in its early stages and has something level of secrecy (I know, tres noir). The first thing I need to do this (it's for the forum) is a list of 20 (more would be great) atheists who changed the world. I need your help here.

They following criteria must apply

1. Must be a self-affirmed atheist. No he was an asshole, thus an atheist shit here.

2. Must have changed the world in some significant way, preferably in a way that is tangible to all of us. It doesn't matter if it was good or bad.

Thanks in advance. I will be in touch with some of you about this and hopefully I can tell you more as I do more.

So far on the list:

Stephen Hawking

Joseph Stalin

Alton Lemon

Carl Sagan

Thomas Edison (I believe he was more agnostic, but further research is needed)

Andrew Carnegie (perhaps)

Ivan Pavlov

Linus Pauling

Francis Crick

Claude Shannon

James D. Watson

Peter Higgs

Richard Leakey

Steve Wozniak

Mark Zuckerberg (Yes, we have to face that facebook has changed the world)

Arthur C. Clarke

Douglas Adams

Bill Gates

Edward Witten

Neil DeGrasse Tyson

David Attenborough

Norman Borlaug

Linus Torvolds

Pierre Boulez

Gene Roddenberry

William Shatner

Denny Crane

Albert Einstein (I'm not sure he was athiest. Have to check this)

Napoleon I

Pope Alexander VI

Abraham Lincoln (honorary agnostic or doubter)

Mark Twain (See Abe)

Alan Turing

Okay, think we have enough now, people. Thank you so much.