That, for instance, which would evidently have value with regard to promoting in a race the greatest possible powers of endurance (or with regard to increasing its adaptability to a specific climate, or with regard to the preservation of the greatest number) would have nothing like the same value, if it were a question of evolving a stronger species.
Adibidez, arraza baten iraupenerako (edo klima jakin batera, edo kopuru handiena kontserbatzera moldatze-indarrak gehitzeko) gaitasun posible handienari dagokionez balioa izan lezakeen zerbaitek begibistan dago ez lukeela inondik ere balio bera izango, adibidez, tipo sendoago bat eratzea helburua izango balitz.