What's the most evil invention?

Medieval pear

I don't know, the brass bull is pretty much all I can think of.

maybe not the most evil in the world but in daily life my vote is for the tie...who came up with the idea of wearing a colorful noose around the neck?

A spork

gunpowder

I'd say the nuke worst thing ever created

The human brain. God is one twisted mother.

The things that come to mind, (guns, drugs) are less evil in and of themselves and more a problem when people abuse and misuse them. Maybe bombs; there are more "humane" ways to kill people, if that's absolutely necessary.