KILLERS OF HUMANITY : WORST LIST

Determining the exact number of humans killed by a ruler throughout history can be difficult, as there are often conflicting accounts and estimates. 

However, here are a few examples of rulers who are believed to have caused the deaths of a large number of people:

Genghis Khan: 

The Mongol conqueror and founder of the Mongol Empire is believed to have caused the deaths of tens of millions of people during his military campaigns in the 13th century. Some estimates put the number at as high as 40 million.

Mao Zedong: 

The former leader of China is believed to have been responsible for the deaths of millions of people during his rule from 1949 to 1976. The exact number is disputed, but some estimates put the figure at around 45 million.

Joseph Stalin: 

The former leader of the Soviet Union is believed to have been responsible for the deaths of millions of people during his rule from the 1920s until his death in 1953. Some estimates put the figure at around 20 million.

Adolf Hitler: 

The former leader of Nazi Germany is believed to have been responsible for the deaths of millions of people, including six million Jews during the Holocaust, as well as millions of others during World War II.

It's worth noting that while these leaders are often cited as examples of rulers who caused the deaths of a large number of people, there are many other examples throughout history of rulers who have engaged in violence and oppression that have resulted in significant loss of life.