Tom Griffith

Consequently the whole body of males inhabiting the same country would tend from the effects of constant intercrossing

In one country the inhabitants value a fleet or light dog or horse, and in another country a heavier and more powerful one; in neither country is there any selection of individual animals with lighter or stronger bodies and limbs; nevertheless after a considerable lapse of time the individuals are found to have been modified in the desired manner almost uniformly, though differently in each country.

called unconscious selection