Christian eschatology is a major branch of study within Christian theology. Eschatology, from two Greek words meaning "last" (ἔσχατος) and "study" (-λογία), is the study of 'end things', whether the end of an individual life, the end of the age, the end of the world and the nature of the Kingdom of God. Broadly speaking, Christian eschatology is the study of the destiny of humankind as it is described in the Bible, which is the primary source for all Christian eschatology studies.