The Most Dangerous Individual To Ever Live

The purpose of this piece is expressed in the title. As a follower of history, I have been wondering, 'Who is the most dangerous individual to ever live?'
Naturally, we think of the most destestable characters that may have lived around our times. Some may cite Hitler, or Stalin, or Pol Pot. Others may cite Amin, or Pinochet, or various war criminals, all of whom caused great damage in our lifetimes.
But to ask who the most dangerous person to ever live, well that is quite different. More often then not, it will me the masterminds behind, those who set in writing their various ideas on certain issues. It is only then that men like Hitler (or others) may take these ideas and either use them once in power, or twist them to suit his needs.
How I want this topic to go is like this:
I wish for all respondents to have a number one choice quite clearly labelled, and a runner up. Because I am the originator of this topic, I will start.
The most dangerous man to ever live:
1. Fredrich Neitczhe
2. Karl MarxWhat does this have to do with evolution. Well I sence that some may put Darwin on, due to the various negative implications of his theory. Even my first choice, Neitchze; One can argue that he relied on his concept of a super race, due to Herbert Spencer's 'survival of the fittest.'Apostle

Mr Hambre,
I would question the honesty of certain people if they did not identify those individuals as the most dangerous people who ever lived. Having said that, please understand that I would disagree with such a position, just as many would disagree with an individual who identified Darwin as the most dangerous man.
Who are your two picks?

This is by no means a sure thing, and is certainly open for debate. Set aside the opinions presented as facts, and we can discuss this if you wish.
Apostle