There are many things you can point to as proof that the human is not smart. But my personal favourite would have to be that we needed to invent the helmet. What was happening, apparently, was that we were involved in a lot of activities that were cracking our heads. We chose not to avoid doing these activities but, instead, to come up with some sort of device to help us continue enjoying our headcracking lifestyles. The helmet. And even that didn’t work because not enough people were wearing them so we had to come up with the helmet law. Which is even stupider, the idea behind the helmet law being to preserve a brain whose judgement is so poor, it does not even try to stop the cracking of the head it’s in.