 Each of these expansions of farming and herding peoples displaced earlier populations of hunter-gatherers, who would have generally been at a demographic and technological disadvantage, and vulnerable to the loss of environment resources (i.e., foraging areas and habitats for game) as a result of the spread of farmland and pastures.Therefore, groups such as the Hadza and the Sandawe are remnants of indigenous hunter-gatherer populations that were once much more widespread, and are under pressure from the continued expansion of agriculture into areas which they have traditionally occupied.Farmers and herders appeared in the vicinity of Hadzaland relatively recently.