The word eschatology, which literally means “the study of the last things,” doesn’t just refer to death, judgment, heaven, and hell, as used to be thought (and as many dictionaries still define the word). It also refers to the strongly held belief of most first-century Jews, and virtually all early Christians, that history was going somewhere under the guidance of God and that where it was going was toward God’s new world of justice, healing, and hope. The transition from the present world to the new one would be a matter not of the destruction of the present space-time universe but of its radical healing.
–N.T. Wright, Surprised by Hope, 122.