The invention and discovery of primitive people. What role did these discoveries

The invention and discovery of primitive people. What role did these discoveries and inventions play in the life of primitive people? Are they still in use today?

The inventions of primitive people include: making fire, spear, harpoon, fishing net, needle, ax, hammer, bow, hoe, etc. Of course, we continue to use all the inventions and achievements to this day. Fire plays a very important role in our life. Many materials are processed with the help of fire. Other things serve as tools or household items, like a needle.