The Late, Great Planet Earth is a treatment of literalist, premillennial, dispensational eschatology. As such, it compared end-timeprophecies in the Bible with then-current events in an attempt to broadly predict future scenarios leading to the rapture of believers before the tribulation and Second Coming of Christ to establish his thousand-year (i.e. millennial) Kingdom on Earth. Focusing on key passages in the books of Daniel, Ezekiel and Revelation, Lindsey originally suggested the possibility that these climactic events might play out in the 1980s, which he interpreted as one generation from the foundation of modern Israel in 1948, a pivotal event in some conservative evangelical schools of eschatological thought. Cover art on the Bantam edition boldly suggested that the 1970s were the "era of the Antichrist as foretold by Moses and Jesus," and called the book "a penetrating look at incredible ancient prophecies involving this generation." Descriptions of alleged "fulfilled" prophecy were offered as proof of the infallibility of God's Word, and evidence that "unfulfilled" prophecies would soon find their denouement in God's plan for the planet.
He cited an increase in the frequency of famines, wars and earthquakes, as key events leading up to the end of the world. He also foretold a Soviet invasion of Israel (War of Gog and Magog). Like many previous books, The Late, Great Planet Earth postulated an Antichrist ruling over a ten-member or ten-nation European confederacy. Lindsey believed that what was then the six-member European Economic Community (later the 28-member European Union) could be a forerunner of this confederacy, which he considered to be a revival of the Roman Empire. He found little in the Bible that could represent the United States, but he suggested that Ezekiel 13:13 could be speaking of the United States in part.Although Lindsey did not claim to know the dates of future events with any certainty, he suggested that Matthew 24:32-34 indicated that Jesus' return might be within "one generation" of the rebirth of the state of Israel, and the rebuilding of the Jewish Temple, and Lindsey asserted that "in the Bible" one generation is forty years. Some readers took this as an indication that the Tribulation or the Rapture would occur no later than 1988. In his 1980 work The 1980s: Countdown to Armageddon, Lindsey predicted that "the decade of the 1980s could very well be the last decade of history as we know it".