What are donors?
Oligarchy, a form of power structure in which power rests with a small number of people. These people might be distinguished by royalty, wealth, family ties, education, corporate, religious or military control.Such states are often controlled by a few prominent families who typically pass their influence from one generation to the next, but inheritance is not a necessary condition for the application of this term.
Oligarchies have often been tyrannical, relying on public obedience or oppression to exist. Aristotle pioneered the use of the term as a synonym for rule by the rich, for which another term commonly used today is plutocracy.
And as Gibbon remarked in his magisterial tome on the Roman Empire, there is an inexorable process by which republics become oligarchies.