By Walter E. Williams, Daily Signal - By the way, Adolf Hitler, head of the National Socialist German Workers’ Party, was responsible for the deaths of about 20 million people. The Nazis come in as a poor third in terms of history’s most prolific mass murderers. According to professor Rudolph Rummel’s research, the 20th century, mankind’s most brutal century, saw 262 million people’s lives destroyed at the hands of their own governments.