Godfather. Puzo M.

Corleone clan is the most powerful throughout America. For society, they are oil traders, but in reality the sphere of their influence is much larger. The only thing that Don Corleone does not want to stain his hands is drugs. His refusal greatly hurts the rest of the families. They cannot forgive such an aging Don. A long war between the clans begins. The concept of generic revenge is still alive, so you can stop the massacre only by going to a risky step. Not many will survive to the truce, but even this will not be able to guarantee them retaliation from old sins...