The need to withstand difficult conditions contributed to the progressive development of mankind. Hunting large animals was possible only with the participation of a significant number of people. It is assumed that the hunt was driven: the animals were driven either to the cliffs or to the dug holes. Thus, a person could survive only in a group of his own kind.
The process of anthropogenesis took about 3 million years. During this time, cardinal changes have occurred in nature more than once: four large glaciations, and within glacial and warm eras, their periods of warming and cooling. During the glacial epochs in the north of Eurasia and North America, a layer of ice up to 2 km thick covered vast territories. An endless tundra stretched from the glacier to the south. In the summer, grasses and bushes grew green here. The glacier lands were quite densely populated by people, since animals lived there, which were the main object of hunting for humans. We are talking primarily about mammoths, woolly rhinos and cave bears (these animals are called the Paleolithic triad).
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.