How did the development of tools chance the life of early humans?

It allow them to expand and therefore got more educated into cooking, farming, building. Look what we have now a day from computer to cars that improved our life dramatic. Allow faster transportation and with new technology like ipod, phone, etc. It allows us communicate with our all over the world. Now tell me that the development of tools haven't changes our life from the early civilization to our modern one now. It shaped us to who we are now. Hope this helps.