3.5M years ago, using stones, created stone knives, hammers, axes and spear tips.
40K years ago, cognitive spurt happened → which led to practical(used for survaival) and non practical inventions(art, jewellery and music).
Within a few millennia → agriculture, domesticated animals, gathered in cities and created culture.
We developed abstract concepts like religion, government and money.
These led to written language, the printing press and the internet.