The worst mass murders recorded in history.

It is recorded that Mao Zedong who was a Chinese politician, political theorist, military strategist, poet, communist revolutionary, the founder and the former president of the People's Republic of China; is to be known as the worst episodes of mass murder in history and the world. He has murdered 80 million people.

Adolf Hitler was an Austrian-born German politician, and the dictator of Germany. He rose to power as the leader of the Nazi Party, becoming the chancellor. He is the criminal of all the Jews that were in the concentration camps during the holocaust.

He believed that the Jewish people were unneeded because they had no religion. He also believed that he was the smartest man in the world. He has murdered 6 million Jews.

Joseph Stalin was the former premier of the Soviet Union, Soviet politician, political theorist and revolutionary who led the Soviet Union governing as a dictator. He has murdered 9 million people.

Genghis Khan was a Mongolian savaged fighter; the founder and first khagan of the Mongol Empire; which later became the largest contiguous land empire in history.

He was known to be the leader of his shamanic tribe worshipping Tengri. He was seen drinking horse blood, cutting his palm with his sword and burning his feet with fire to exalt himself.

He fought with Osman 1, the leader of the Turkish Kayi tribe and the founder of the Ottoman Empire. Genghis Khan's ambition was to become the ruler of the world. This battling war caused him to murder 40 million Turks.

The worst serial killers with the highest victim counts in history

Luis Garavito Colombia years active: 1992–1999 proven victims: 193 possible victims: 193–300+ He was a child-murderer, torture-killer, and rapist known as "La Bestia" ("The Beast").

Pedro Lopez Colombia years active: 1969–1980 proven victims 110 possible victims: 300+ He was a child-murderer and rapist, known as "The Monster of the Andes".

Javed Iqbal Pakistan years active: 1998–1999 proven victims: 100 He was a Child-murderer and rapist, known as "Kukri".

Mikhail Popkov Russia years active: 1992–2010 proven victims 78 possible victims 83+ He was a serial rapist-killer nicknamed "The Werewolf".

Daniel Camargo Barbosa Brazil years active: 1974–1986 proven victims: 72 possible victims: 180 He was a child and woman murderer.

Pedro Rodrigues Filho Brazil years active: 1967–2003 proven victims: 71 possible victims: 100+ Rodrigues Filho claimed to have killed over 100 victims.

Kampatimar Shankariya India years active: 1977–1978 proven victims: 70+ Shankariya was an Indian serial killer who used a hammer to kill.

Yang Xinhai China years active: 1999–2003 proven victims: 67 Known as the "Monster Killer". Yang would enter victims' homes at night and kill using axes, meat cleavers, hammers, and shovels.

Samuel Little USA years active: 1970–2005 proven victims: 60 possible victims: 93 He is thought to be America's most prolific serial killer.

William Unek Belgium years active: 1954–1957 proven victims: 57 William was also a police constable.

Andrei Chikatilo Soviet Union years active: 1978–1990 proven victims: 53 possible victims: 56 He was known as "The Butcher of Rostov", "The Red Ripper" or "The Rostov Ripper".

Anatoly Onoprienko Ukraine years active: 1989–1996 proven victims: 52+ He was known as "The Beast of Ukraine", "The Terminator", and "Citizen O".

Florisvaldo de Oliveira Brazil years active: 1982–1983 proven victims: 50+ Known as "Cabo Bruno"; He was a former police officer and vigilante who murdered criminals.

Gary Ridgway USA years active: 1982–2000 proven victims: 49 possible victims: 71–90+ Gary was a truck painter who confessed to killing women. He was also known as The "Green River Killer". He almost exclusively targeted sex workers.

Alexander Pichushkin Russia years active: 1992–2006 proven victims: 49 possible victims: 60 Alexander was also known as the "Chessboard Killer". He stated that his goal was becoming Russia's most prolific serial killer.

Wang Qiang China years active: 1995–2003 proven victims: 45 possible victims: 60+ Wang killed 45 people and raped 10 women.

Ahmad Suradji Indonesia years active: 1986–1997 proven victims: 42 Ahmad was convicted of strangling at least 42 women and girls.

Raman Raghav India years active: 1965–1968 proven victims: 41 He bludgeoned 41 people to death.

Moses Sithole South Africa years active: 1994–1995 proven victims: 38 possible victims: 76 He was known as South Africa's Ted Bundy.

Omar Abdul Razeq Abdullah Rifai Egypt years active: 2008–2013 proven victims: 38 After being released from prison in 2013 for his involvement in the deaths of 23 people during a domestic dispute, he opened fire in his village with a rifle, killing 15 people before being shot dead by other villagers.

Serhiy Tkach Ukraine years active: 1984–2005 proven victims: 37 possible victims: 100+ He was also a former Ukrainian police criminal investigator.

Gennady Mikhasevich Soviet Union years active: 1971–1985 proven victims: 36 possible victims: 43–55+ Gennady killed women by strangling them.

Hadj Mohammed Mesfewi Morocco years active: 1906 and earlier proven victims: 36+ He was known as the "Marrakesh Arch-Killer"; he drugged, mutilated and murdered women.

Vera Renczi Romania years active: 1920–1930 proven victims: 35 The Romanian serial killer was nicknamed, "The Black Widow".

Fernando Hernández Leyva Mexico years active: 1982–1999 proven victims: 33 possible victims: 137 He was accused of 137 murders and was convicted of 33 murders.

John Wayne Gacy USA years active: 1972–1978 proven victims: 33 possible victims: 34-45+ He was known as the "Killer Clown", due to the fact he often entertained children at social events dressed in a self devised clown costume. John is known to have murdered a minimum of 33 teenage boys and young men.

Ali Asghar Borujerdi Iran/Iraq years active: 1907–1934 proven victims: 33 He was known as the "Asghar the Murderer". He killed 33 young adults in Iran and Iraq.

Vasili Komaroff Soviet Union years active: 1921–1923 proven victims: 33 He was known as "The Wolf of Moscow"; Vasili was a horse trader who killed 33 men.

Ramadan Abdel Rehim Mansour Egypt years active: 1999–2006 proven victims: 32+ Ramadan was a gang leader known as "al-Tourbini" ("The Express Train"). He had raped and tortured homeless children, (mostly boys). The victims were usually thrown off the moving train when they were dead or in agony; other times, they were thrown into the Nile river or buried alive.