Complex sentence: The "Eternity" of the title is an organization and a place outside time, staffed by male humans called Eternals recruited from different eras of human history commencing with the twenty-seventh century.
Split into simpler sentences: The "Eternity" of the title is an organization and a place which exists outside time. It is staffed by male humans called Eternals who are recruited from different eras of human history commencing with the twenty-seventh century.