Mankind:

a single-sentence definition

“Man is the animal who thinks it is not an animal.”

Readers are invited to attempt submissions of shorter and/or more precise definitions.

Pia desideria, or, Divine addresses in three books : illustrated with XLVII copper-plates / written in Latine by Herm. Hugo ; Englished by Edm. Arwaker.
Hugo, Herman, 1588-1629., Arwaker, Edmund, d. 1730., Sturt, John, 1658-1730.
London: Printed for Henry Bonwicke ..., 1686.