Have you read the book "Death by Government" or "China’s Bloody Century" written by R. J. Rummel? I would bet that you will find his books extremely informative since the history of the ugly mankind has become such a hot topic lately. With records of over 8,000 estimates of genocide and mass murders from over a thousand sources, R.J. Rummel, the former Yale professor and Nobel Peace Prize nominee, presented a telling picture of the disproportionate number of murders of their own citizens caused by their own governments than by war.
You have probably heard the term “genocide”. An example of genocide is the Holocaust, the extermination of roughly six millions of Jews throughout Nazi-occupied territory by Nazi Germany and its collaborators that took place between 1933 and 1945. Its definition as described by the book is the killing of people by a government because of their indelible group membership (race, ethnicity, religion, language). You might have also heard the term “politicide”; by definition of the book, it is the murder of any person or people by a government because of their politics or for political purposes. An example of politicide is the 228 Incident in Taiwan on February 28th 1947, when the arrest of a cigarette vendor in Taipei led to large-scale protests by the native Taiwanese against the corruption and repression of Chiang Kai-shek's Chinese Nationalists, and later turned into an indiscriminate killing of roughly 28,000 Taiwanese in the entire Taiwan Island in two weeks.