Love of money is the root of all politics.

Have you heard the one about the tribe of Basques who lived in this valley? They heard that barbarian hoards were approaching, so they decided to lay a trap. They all waited in the hills at the entrance to the valley. When the barbarians passed by, they descended on them. Unfortunately, the barbarians had a lot more experience at warfare than the Basques did, and the Basques got slaughtered. The moral: Don't put all your Basques in one exit.