The material gives two developments that helped the biological basis of culture. One of these developments is bipedalism. According to evolution, Homo sapiens developed a pelvis that was shorter and rounder, for better movement. Bipedalism is worse for birthing purposes, than walking on all fours. However, it is better finding nourishment and outrunning predators. The other development was an increase in cranial capacity. As the years went on, homo sapiens, with their newfound bipedalism, began to have an increase in the size of their heads. The cranial capacity of modern humans is three times that of Homo sapiens with newfound bipedalism. With the contributions of these two developments, Homo sapiens began to produce offspring that were undeveloped
