<b>Abiogenesis and Accelerated Eukaryogenesis</b>

This brief outlines a deterministic, gradient-driven framework for the origin of life and the rapid emergence of eukaryotic cellular structures on early Earth. It integrates planetary-scale energy gradients, dynamic chemical cycling, and regional divergence in evolutionary progression. A formal thermodynamic ratchet model is presented to explain irreversible complexity buildup and endosymbiosis as a natural consequence of energy optimization. The approach unifies geophysical, chemical, and biological factors under one coherent mechanism, eliminating stochastic dependence and treating complexity emergence as inevitable.