Back to our roots

Australopithecines first walked upright: 3.5+ million years ago.
First appearance of Homo: about 2 million years ago.
First stone tools/weapons: about 2 million years ago.
First handaxes: about 1.6 million years ago.
First appearance of Homo sapiens: about 100,000 years ago.
First hafted weapons: 25-100,000 years ago.
First known migration by boat (Australia): 50,000 years ago.
First colonisation of America: 12,000 years ago (perhaps earlier)
Large mammals extinct: mostly by 10,000 years ago.
First known agriculture: around 10,000 years ago

Only very, very recently we formed our post-industrial revolution culture, it was overnight that we understood ourselves as "modern men." Free Spirit spheres rescue the primeval, primordial and primal in us for around $80 a pop.