I feel very comfortable with saying that they symbolise the failures of the human races much better than almost anything else.

1. Fascism - there is an obvious link
2. Classism - there is an obvious link
3. Pedophilia - there is an obvious link
4. Colonisation- there is an obvious link
5. Exploitation …
6. Politics by old people for old people
7. Traditionalism
8. …
9. …

You get the point. What is wrong with the world? A picture of these people would be a matching picture, no matter what answer you want to provide.