2 adjectives to describe inhuman

And first it must be always borne in mind, that Slavery, as a system, is based on the most audacious, inhuman, and self-evident of lies,the assertion, namely, that property can be held in men.

We may call him crazy, inhuman, a fanatic, a devil-worshipper; he does not mind what we call him.

2 adjectives to describe  inhuman