People KilledGovernmentYears
61,911,000U.S.S.R.1917-87
35,236,000China (PRC)1949-87
20,946,000Germany1933-45
10,075,000China (KMT)1928-49
5,964,000Japan1936-45
3,466,000China (Mao Soviets)1923-49
2,035,000Cambodia1975-79
1,883,000Turkey1909-18
1,670,000Vietnam1945-87
1,663,000North Korea1948-87
1,585,000Poland1945-48
1,503,000Pakistan1958-87
1,417,000Mexico1900-20
1,072,000Yugoslavia (Tito)1944-87
1,066,000Russia1900-17
910,000China (Warlords)1917-49
878,000Turkey (Ataturk)1919-23
816,000United Kingdom1900-87
741,000Portugal (Dictatorship)1926-82
729,000Indonesia1965-87
13,637,000Others1900-87
People killed by their own government in the 20th century excluding war deaths. Source: Death by Government, R. J. Rummel

Bloody Politics

The table to the right should be enough to convince anyone of the seriousness and the impact of philosophy. The governments founded on the most evil of the ethics, such as altruism and collectivism, are the bloodiest. And this chart doesn't include the blood of the Dark Age theocracies with their inquisitions and holy wars.

Socialism
Communism
Fascism
Anarchism
Anarcho-Capitalism
Adjustment to Government Intervention
The Poor Suffer Under Capitalism
Military Draft
Zoning Laws
Public Schools
Redistribution of Wealth
Public Welfare
Roads and Infrastructure
Democracy
Antitrust
Positive Rights
A "Mixed" Economy
Government Regulations (The FDA)
Money
Social Security
Campaign Finance Reform