What Is the Essential Truth About "End Times"?

In this blast from the past, J. Warner examines the ways believers have traditionally viewed "end times". What's the difference between Pre-Millenialism, Post-Millenialism and A-Millenialism? Is only one of these views the orthodox view that we, as Christians, can accept and still call ourselves "Christians"? How do these views about the "end" inform the way we are living today?