Comment by fighterpilot

It's an intriguing idea. There is something very civilizationally resilient (anti-fragile) about having heterogeneous agents upon which evolution can operate on, though. If there's only a single agent then it could plausibly get stuck in a pathological crevice in the fitness landscape which wouldn't happen in a multi-agent civilization. Although the flipside to that is a single agent won't have a tendency to exterminate itself through tribal conflict.