He lay in wait for them, or ran them down on foot.

Then he learnt to use stones as tools; making stone arrow-heads and spear-points, thereby utilizing his labour, and killing birds and animals more quickly.
The original savage knew nothing of agriculture.

It was only in comparatively recent times that men gathered seeds for food, and saved a portion of them for next year's crop.

When minerals were discovered, and fire was applied to them, and the minerals were smelted into metal, man made an immense stride.

He could then fabricate hard tools, chisel stone, build houses, and proceed by unwearying industry to devise the manifold means and agencies of civilization.
The dweller by the ocean burnt a hollow in a felled tree, launched it, went to sea in it, and fished for food.