Early man, then, excluded their women across-the-board from the hunt. In fact, the way in which such hunters managed to survive was due not to the personal, individual prowess of man against beast, but rather through cooperation in the hunt; early Homo sapiens pitted their skills, in consort, against the animals of forest or tundra. Men and women ideally could have entered the hunt together. However, those hunters who did not include their women may have had more success in the kill than other groups which did take their women along. A very important correlate of this data shows that even in societies with strong hunting activity, women contribute more than half of the food supply, albeit of a non-protein variety, by their foraging for plant foods in the vicinity of their campsites. In this manner, their contribution to the evolutionary success of the social group cannot be underestimated. Perhaps the importance of certain amino acids from meat, not nutritionally available from tuberous root crops gathered mainly by women set the stage for the inflated role of the hunter. This in turn may have given rise to a high social value placed on hunting, with subsequent subservient roles valorized for females.