My natural sensors don't consciously remind me how far they are from my brain each time I use them. To boldy grow where no man has grown before'. The 'human element' periodically disappears from the picture. Every time there's a great mechanized war, the human element largely disappears for awhile and the sides become inevitably engaged like battling robots until one or more side's resources are sufficiently diminished. The effect of such a war, becomes irrelevant to its cause.
Humans sometimes seem a nice compromise between animals and machines.
The dividing line between these extrema is not so much a crisp straight line as a waving curve.