1
The Species Problem
William Blake
From Auguries of Innocence
To see a world in a grain of sand,
And a heaven in a wild flower,
Hold infinity in the palm of your hand,
And eternity in an hour.
A robin redbreast in a cage
Puts all heaven in a rage.
A dove-house fill'd with doves and pigeons
Shudders hell thro' all its regions.
A dog starv'd at his master's gate
Predicts the ruin of the state.
A horse misused upon the road
Calls to heaven for human blood.
Each outcry of the hunted hare
A fibre from the brain does tear.
Why classify?
• … in life generally?
• … in science?
• Why classify species?
– Taxonomy
–Evolution
– Policy
