What is the physical nature of force prior to the existence of mass, electric charges, weak and strong nuclear charges? The four fundamental forces of nature are strong nuclear, electromagnetic, weak nuclear, and gravity. During the big bang and shortly after during the radiation era sub-elementary particles and charges had not formed yet. What was the physical nature of force prior to the presence of matter which fixed the geometry of space-time? Could a scalar force field exist that is solely function of temperature? Can such force field extend to today's matter dominated era? Is it invariant?