This comprises the general population of females.  Ages range from the very young to the very old.
All females seem to start out as non-alphas. Other women have described such people as chicks, like the young of chickens. While some will dominate others even from an early age, the alpha tendencies do not seem to appear till early adulthood. A combination of family of origin, the presence of other alphas in the immediate family, testing scenarios or a trial by fire seems to give the non-alpha the confidence to move into an alpha role.