Levi Levi is the man in charge of the Source. He has control of a number of guards and nearly endless supplies. His parents abandoned him for his brother to survive, leading to his anger.
Caleb and Levi were born to the same parents. Their parents left Levi to die, and Levi turned all of his efforts toward ruining Caleb's life. He stole Caleb's son and murdered his partner.
The article talks about how the European governments have Nazi connections. In the book, the group in control have connections to the group that everyone is afraid of.