Anarchism

General
Anarchy is when a country has no designated leader/ government that is either active or in existence.

How It would Work
Anarchy would only work in small tribes of about 15-20 people. Any more and a leader would be needed to maintain order. Any less and a tribe could not be formed.

Why it doesn't work
Because there are billions of people on the planet and only a few hundred countries, there has to be order.