The stereotyping of sexual roles in society is part of a widely accepted rigid ideology and social structure. In one aspect it manifests as a traditional division of labour, claiming descent from supposed pre-historic patterns where males were typically migrant and aggressive foragers and hunters, while females reared children, prepared food and did not go far from tribal encampments and dwellings. In another aspect, sexism manifests as the custom of disproportionate rewards, the greater share being demanded by, and given to, the male.