system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:What is a Saudi prince? Why are they always rich? Why are there so many of them?

I always see people talk about Saudi Princes but it seems they're always extremely loaded. Are they all from the same family? Why so many different families with so many different princes?
gpt
Yes, they're all from the same family; namely, the House of Saud. Saudi Arabia is a monarchy, and has been ruled by the House of Saud since the 18th century.

The House of Saud is massive -- about 15,000 members. All the main ministerial positions in government are reserved for members of the House of Saud. And King Abdullah has four wives, seven sons and 15 daughters.

The family is rich because they literally own Saudi Arabia; and with it, they control 18% of the world's oil. It's estimated that the king has a personal fortune of $18 billion.