In this article Nissani draws extensively from observations of others who have examined the nature of private banking and its effects.The rather long article's main strength is that it sees much of the history of the USA determined by the actions of the top part of the capitalist class--the major bankers.
In this history he also explains a bit about the development of banking and how central banks and banks in general work to create money out of nothing and charge interest on it. With this class's control of banking, they also determine who gets funding and who doesn't. Thus banking gives bankers incredible power by giving them control over the issuance of money and who gets the money they create out of nothing. With this double power they have managed to create an invisible government that is a kind of puppet play of official "democratic" government behind which they pull the strings of their puppets. This major banker class have also managed to install their agents in every institution of society.
The bankers have played a destructive role in American history, always achieving their goals through a combination of clandestine conspiracies, control of information sources, controlled elections, bribery, intimidation, smears, imprisonment, and assassinations.