As complexity outpaces our capacity to govern it, traditional tools like control and trust begin to fail. This keynote explores why 20th-century system design — based on predictability, authority, and compliance — is no longer sustainable in a world of decentralized intelligence, synthetic information, and cascading uncertainty. Drawing on principles from biology, system dynamics, and AI ethics, Achim Lelle proposes a radical design shift: building systems that do not require control to stay stable, and that do not collapse when trust is lost. Instead of trying to preserve certainty, we must design for coherence — architectures that adapt, self-correct, and survive without needing belief to function. This is not speculative futurism. It is a pragmatic strategy for institutions, teams, and technologies facing systemic fragility today.