What difficulties did primitive people experience and how did they overcome them?

Primitive people united in herds to fight hardships. During the Ice Age, for protection from the cold, people sewed clothes from the skins of killed animals and took shelter in caves from the weather. Such tools as a chopper, harpoon, spear, and later a bow and arrow were used when hunting wild animals. In order not to die of hunger, people are forced to collect roots, fruits, mushrooms. If poor-quality and poisonous food came across, people died. The life expectancy of ancient people was significantly reduced due to the difficulties of fighting nature and diseases.