I know Peter Zeihan. He focuses mainly on energy and demographics. His predictions have a shoddy record. He is your typical "China will collapse any day now" think-tanker. In my opinion his analyses are simple and unscientific. He presents easy to digest ideas in an understandable way, he is also a great speaker. But if you actually deep dive into his narrative and the actual data, you will soon discover that he is mostly wrong or dramatically exaggerating.