I wanted to add a reply about your mention of the Left Behind
There is an entire topic field over at www.christianbbs.com
devoted to "Prophecy and the End Times." Naturally, it is rife with Dispensationalist chiliasm and Pre-Trib Rapturist speculations.
I am pretty familiar with the Dispensationalist system, having spent some time as a teenager as a Southern Baptist. I used to read every "end times" prophecy book that came along and even carted a Scofield Reference Bible
almost everywhere I went.
The more I see of Dispensationalism, the more I realize why the Church rejected chiliasm at its second general council, at Constantinople in 381.
It's a wild, arcane, convoluted system that posits several "Second Comings," several "resurrections," and numerous "Last Judgments." It's a heresy that has captured the popular imagination, as seen in the enormous sales of Left Behind
I forget which Father (or Fathers) said this, but one or more of them said that everything in Christian doctrine is linked to everything else. If you get one thing wrong, all the other truths begin to fall with it. If you are wrong on baptism, you'll be wrong on the Eucharist sooner or later. If you misunderstand the Eucharist, pretty soon your view of Christ will be warped, and so on.
I see the current popularity of Dispensationalism as merely an outgrowth of Protestant mistakes in other places. Once you get messed up and lost, you can make all sorts of wrong turns.