I've been in education of some kind for over fifteen years now, and over these years I've had many history classes, concerning a variety of topics. Something strange happens in all of them, though - without exception, the classes never seem to spend more than a single session on anything that happened after the 1950s. In high school, we had a single class to talk about the Cold War; two other years of history didn't even go that far, except in the broadest of strokes with mentions of decolonialism. In a college course on American history, our last session was the origins and beginnings of the civil rights movement, with nothing beyond that. The social, technological, political and ideological shifts in the past half-century seem to be deemed unworthy of teaching. Why is this? Aren't the social and technological developments of the last sixty or seventy years at least as critical to the understanding of modern society as the sum of all that came before? What is the importance of teaching the history...

I agree entirely with the general point that you are making. I think that the events of the last 60-70 years are worthy of discussion in high-school history classes. Although I don't really know how to measure whether they are "at least as critical to the understanding of modern society as the sum of all that came before", I'll admit that they are pretty darn critical. I don't think that the reason that relatively recent events are less often taught in history courses is that they aren't believed to be important. There are many possible explanations for the relative neglect of recent history in high-school history classes. One is that there is so much older history to get through that teachers do not leave enough time for recent events. Another is that recent events are so much more controversial than earlier events that it is difficult to write textbooks that will be approved by school boards that cover these recent events. Another is that the overall significance of recent events is not yet entirely...