[CamperBob2]

In particular, the speed limit on West Texas are set by the Texas Department of Transportation.

Not when I was driving there, it wasn't. (This is called "showing my age," for the benefit of those who haven't had the opportunity to catch themselves doing that yet.)

Governments have many powers besides cracking down on criminals

What are some examples, apart from foreign policy where the basis of power is ultimately military?

[stinkytaco]

Examples?

Cleaning streets, putting out fires, educating, infrastructure...

As someone who's spent some time in places with no government I will say there are many examples, but punishing criminals is one I've become fond of.

[icebraining]

Controlling the supply of money.

[CamperBob2]

Think it through a bit farther. How exactly do they "control the supply of money?"

Hint: try printing your own, and see how that goes.

[stinkytaco]

This is purely pedantic, but making printing money illegal is controlling the supply of currency, which is different than controlling the money supply.

The money supply is elastic and can't strictly be controlled by anyone. The government will artifically increase it by printing currency or loaning money, however, which has essentially the same effect.

[icebraining]

BerkShares Inc. has been doing it for years now.