earthist

Noun

 * 1) A proponent of earthism.
 * 2)  An advocate for people who live on earth, as opposed to those on other planets.
 * 3)  One who believes the earth has a specific property or history.
 * 1)  An advocate for people who live on earth, as opposed to those on other planets.
 * 2)  One who believes the earth has a specific property or history.
 * 1)  One who believes the earth has a specific property or history.
 * 1)  One who believes the earth has a specific property or history.
 * 1)  One who believes the earth has a specific property or history.

Adjective

 * 1) Pertaining to earthism.