Excellent Den Beste article about the Tragedy of the Commons, using as examples worldwide fisheries, the Sahara, third-world graft, and European social policy. Den Beste can be prone to silly exaggerations or errors - England can be said to have conquered Scotland only if you're standing on your head and mis-categorizing the '45 and '15 as "conquests" rather than the civil wars they were, to take one recent example - but his general lines of argument are fairly sound.