if an organism survives competition for resources then this organism will survive / reproduce for natural selection
if survive occurs then recuperate occurs. mortal_species_survives_must has method_for_reproduction humans has competitive_nature evolution has effect_of_creating_new_species multicellular_organism_reproduction_event is organism_reproduction_event. surviving is economic_occurrence. organism_reproduction_event is biological_reproduction. mankind_probably has finite_existence natural_selection is evolutionary_theory. if survive occurs then be occurs.