system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:what is a libertarian?
gpt
A consequentialist libertarian is someone who thinks the government's functions should be limited to the activities that require force.  Consequentialist libertarians think the government should:
1. Prevent body crimes like murder and rape
2. Prevent property crimes like theft and fraud
3. Adjudicate the terms of contracts when there is a dispute.

Some consequentialist libertarians would also include providing certain public goods (like lighthouses) that cannot be easily be provided by the free market as a legitimate government function.

Other libertarians, known as deontological libertarians, follow the Non-aggression principle which is the philosophy that it is immoral to initiate force or fraud against another person or their property.  Everyone, including the government, must follow this philosophy in order to be moral, accoding to deontological libertarians.

All libertarians are united in wanting a very small, limited government.