Someone will one day do a great movie on Margaret Thatcher, but this is not it. Here she appears as merely stubborn rather than principled and deliberate. The political and economic context does not come across (and is dominated by cliches) so it is unclear what Thatcher did, why, and why it mattered. Much time is spent witnessing Thatcher's ailing days, which makes this a movie more on aging (quite well done, despite the disappearing Denis being hard to figure out initially) than on character and history. In the end, we are left without understanding either Thatcher or her times. But the movie is worth watching to enjoy the excellent acting of Meryl Streep as Margaret and Jim Broadbent as Denis.