Beyond Efficiency: A Universal Energy Survival Law for Communication, Energy, and Living Systems

Conventional energy efficiency metrics systematically overestimate usable energy delivery in real systems by treating energy conversion as a single-stage process and by neglecting irreversible thermodynamic degradation. Across biological metabolism, renewable energy technologies, electric propulsion, data centers, and mobile communication networks, observed field-scale performance consistently falls far below laboratory or nameplate efficiencies. In modern telecom infrastructure, rising power consumption has failed to deliver proportional gains in information throughput, revealing fundamental limits not captured by efficiency or energy-per-bit metrics. Here we introduce a Unified Energy…