By Hanna Arendt
Eichmann was a German-Austrian official in the Nazi Party and an officer in the SS. He wasn't a particularly bright individual. He followed the law. He followed his orders. He wasn't particularly antisemitic, yet somehow he oversaw the death of millions of Jews.
There is a great amount of detail in the book. What struck me is how the Nazi's twisted their law and their language so that the majority of officials and officers didn't need to actually need to admit what they were doing. The officers were each doing their small part, following their lawful orders, to help accelerate the final solution for the Jewish problem. One helps improve the process needed to strip Jews of their citizenship. One helps build interment camps. One helps organize transport of undesirable people. And one helps build gas chambers so that there is an opportunity for a peaceful death, rather than starvation, slavery or defeat by the enemy.
So much pretty language.
In "The Plague" a character says "I'd come to realize that all our troubles spring from the failure to use plain clear-cut language. So I resolved always to speak-- and to act-- quite clearly, as this was the only way of setting myself on the right track."