Some race love to kill, some race love to preserve the peace that has been declared over decade within this universe.
Some race loves being wealthy, some race think that they have to conquer the world no matter how their motive is, and some race is certainly only a 'part' of this universe.
But the world had not fully improved since the old world where barbaric ways is the only way of life, killing each other becomes the way to win and stay alive. The same thing happened in the modern days, and for god sake, I'll tell you something that you don't have to be surprised anymore if you heard any of kind of  news like this, on the third world country, or anywhere else in this universe.
I tend to say that no one can erase the history, that history is the previous event that had been written in this world and no one can deny their own histories in this universe.
In this race concept, I would say that the role of a predecessor for the race has some important function to their successors. Indeed, I found that some race is absolutely underrated, that some race is like a parasite in this world.
But simply let me say, let me hug you first, give you the best place upon my throne, and well, let us works together and let me remind you that, et confodere te a tergo. Which means, In the business I run, there's no such thing like pluralism.
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The Mafia, a network of organized-crime groups based in Italy and America, evolved over centuries in Sicily, an island ruled until the mid-19th century by a long line of foreign invaders. Sicilians banded together in groups to protect themselves and carry out their own justice.
In Sicily, the term "mafioso," or Mafia member, initially had no criminal connotations and was used to refer to a person who was suspicious of central authority. By the 19th century, some of these groups emerged as private armies, or "mafie," who extorted protection money from landowners and eventually became the violent criminal organization known today as the Sicilian Mafia.
The American Mafia, which rose to power in the 1920s, is a separate entity from the Mafia in Italy, although they share such traditions as omerta, a code of conduct and loyalty.
Source : http://www.history.com/topics/origins-of-the-mafia
