I'm not going to insult the man, but I did read "The Late Great Planet Earth" in the middle 1970s and distinctly recall hearing about the 10-headed beast being the Common Market and the single generation after the creation of Isreal pointing to the Second Coming sometime in the mid-80s. He's just one of many who have gotten entranced with the idea that they can see patterns and shapes hidden in the words of the Bible, and I can't fault him for that. It's a human flaw to see patterns where none exist. In his favor, he's not ready to instigate thermonuclear war to facilitate the arrival of the next kingdom like the current president of Iran's obsession with the Twelfth Imam.
but a single generation in bible language i think is around sixty years. i wish someone would really get the quotes on which he was wrong--i would like to know if it is true or not. lots of people attempt to understand prophecy and just because they dont have the interpretation perfect (e.g., common market vs. european union--aren't both variations on the same theme--resurrection of some form of the roman govt.) does not mean they are all washed up. now giving a prophecy and getting it wrong is a completely different matter though.....i don't recall hal being a prophet ever.