As we know about earth’s atmosphere before life emerged. i think for more clarity we must go on with the exploration out side earth to find out possibility of life is unique in earth in universe

By adding another sentence like life can be a self sustainable chemical system which can experience exclusion in an inclusive space-time i think in which the darvin theory is a part of self sustaining system

Life may be defined as a self sufficient chemical system that can experience exclusion in an inclusive space time