Excellent. The antagonists in my new series are based on Thiel and Musk. .These lines from your article describe the underground cities in my books well.

An environment where a choice few govern themselves and give themselves the power to control everything, and run experiments on everybody else and if you don’t like it you’re left out in the wilderness to fend for yourself.

My series is a five book hard science fiction take on a future world that has been devastated by climate change.

In order to survive a few choice people you describe live underground and are controlled by a small group of elite technocratic/ plutocrats. Everyone else is left outside on a devastated planet to fend for themselves.

It's a futuristic story that spans several centuries and while it has dystopian elements, it is hopeful.

Here;s a review by a fellow writer on Medium https://medium.com/@ken.korczak/intense-entertaining-sf-novel-is-a-dark-vision-balanced-by-hope-6bbbdc602637