A Universal Functional Approach to the Theory of Everything

This work presents a universal functional approach, from which spacetime, gravity, particles, and fundamental constants emerge as derived entities rather than assumptions. The framework provides a compact mathematical structure, reproduces General Relativity and the Standard Model in the appropriate limits, and naturally explains the small but non-zero cosmological constant. A key quantitative prediction is the existence of gravitational wave echoes with a characteristic delay of about 50 ms after black hole mergers, testable with current detectors such as LIGO and Virgo.