In one work, he insisted that beautiful Maori tattoos do not belong on the 
In one work, he insisted that beautiful Maori tattoos do not belong on the human face; in another, he sought a so-called Copernican revolution of metaphysics. His political essays include "Idea For a Universal History" and "Perpetual Peace." He identified time and space as preconditions for the understanding, distinguished between the sensory phenomenon and noumenal things-in-themselves, and sought to determine whether a priori synthetic judgments are possible. He advocates treating people as ends, not means, in Groundwork for the Metaphysics of Morals in terms of the categorical imperative.  For 10 points, name this author of Critique of Pure Reason.
In one work, he insisted that beautiful Maori tattoos do not belong on the human face; in another, he sought a so-called Copernican revolution of metaphysics.
Immanuel Kant