Sometimes it is difficult to utter what is right and correct in life. But evil and wrong are easy to say. This work is about that: worst errors, biggest mistakes, and most horrible tragedies that people performed since the beginning of the 20th Century.

This kind of people have been referred to in some textbooks as heroes. In fact some of them are still beloved by many people and because of this it is important to establish the premise that they were assassins.

I know the people I have chosen could not have killed that many people only by themselves. They could perform those atrocities just because there were people who supported them in their policies. These genociders became leaders because of ignorance, and that is exactly what has to be fought. There are a lot of other personalities who could have been represented here but there is not enough room for all of them.