Anne Applebaum looks at the decay of democratic government in Poland and Hungary, and draws so rather disturbing parallels with what's happing in the USA at the moment:
A Warning From Europe: The Worst Is Yet to Come.
She also makes a broader point that people tend to see history as a process, as a tale of progress towards more free and democratic governance-- she says it's a particularly US attitude, but I think it's more general than that -- while it can equally well be seen simply as things happening, and societies changing from more repressive to more free back again to more repressive as events take their course.
That's something I've thought for a long time -- politics and ethics aren't like the sciences, where knowledge does progress, Rather, politics is about groups, or coalitions of groups, competing for power, and what is gained in one generation can easily be lost later on.
Anyway, interesting, though rather sobering, reading.