A woman sits in a bathtub. The bathroom is almost entirely normal. But there is one shocking thing at the edge of the bath - a picture of Adolf HitlerA dictator, and the leader of Nazi Germany during World War Two. . She is sitting in Hitler's own bath.

The woman in the picture is Lee Miller, an American war photographer. She is the focus of Lee, a new film about her life.

Some use Lee's photo of a very ordinary bathroom to talk about a big idea: the banalitySomething that is boring or unexciting. of evil.

The saying was used by the philosopherA thinker who comes up with ideas about big questions in life. Hannah ArendtA Jewish German political philosopher who escaped a concentration camp and fled to America. She wrote extensively about Nazism. in a book in 1963.

In her book, Arendt wrote about NaziA German political party of the twentieth century, led by Adolf Hitler. The Nazis controlled Germany from the early 1930s until the end of World War II. official Adolf Eichmann, who in World War TwoA global war that lasted from 1939 to 1945 and included all of the great powers. was a key figure in the HolocaustThe murder of six million Jewish people in Europe by Nazi Germany. Members of other minority groups were also killed. .

She thought he was "terrifyingly normal" - a man just following orders and doing his job.

Anyone, she said, could be evil in the right (or wrong) situation.

Should we treat evil as ordinary?

Yes! Everyone is capable of doing evil things. And yet most of us are also very normal. We should not think of evil as "extreme" - because anyone can take part in it.

No! Most people would never do evil things - even if someone else told them to. Not everyone is like Eichmann.