Thus, a women would have intercourse with as many of the 'wild man' types as possible in order for the natural law of 'selection to occur: to only become pregnant by strong, vital men which would then guarantee the survival of the species.
(a women; would have; ) (a women; to only become; pregnant) (strong, vital men; would guarantee; the survival of the species; T:then)
a women a women strong, vital men
would have to only become would guarantee
pregnant
the survival of the species T:then