What is complexity and emergence?

Example: You have a morning routine agent that wakes you at 5:30 AM, a fitness agent that tracks your daily exercise, and a nutrition agent that logs your meals. None of them were designed to interact. But over three months, the early wake-up shifts your eating window earlier, which shifts your energy peak to mid-morning, which moves your best workout time from evening to 7 AM. You did not plan this. No single agent decided it. The three agents, each following their own rules, produced a metabolic rhythm that none of them specified. That rhythm — an emergent property of their interaction — now outperforms any schedule you could have designed top-down.

This concept is part of Multi-Agent Coordination in the How to Think curriculum.