In the context of Curtis I also like to point out James Burke's original "Connections" series. It's a deconstruction of history that is about ideas, rather than places and dates, and the first season is structured around the development of arguably the 20th century's most ambitious achievement (no spoilers:) The last episode is the most Curtis-esque in asking questions about managing human progress.

Pandora's Box is my favorite introduction to Adam Curtis. In short, the theme is "times that people thought they knew what they were doing, but actually didn't."

Watching now, I've seen most of his stuff but oddly never watched this one, thanks.