system
Given the following post, respond as if you're commenting on Reddit:
human
How is Communism supposed to work?

This might appear to be an odd question but after reading a lot about Communism in school and on the Internet I'm still not really sure how it was supposed to work. I'm not referring to how actual Communist countries worked, I more or less understand that. I'm referring to the ideas from Marx before the Soviet Union was founded, though latter ideas would be acceptable too.

I'm trying to understand how Communism would work along these lines: in a Monarchy the King, who is the eldest son of the previous King, is in charge of the country. He has absolute authority to make laws, appoint officials, draft an army, judge and punish criminals, and collect taxes as he sees fit.

In a Pure Democracy the whole population is votes on each law, and those laws are used to appoint officials, determine taxes, set punishment for cimes, declare war, and even determine the procedure for making new laws.

I can describe other forms of government similarly, but I cannot do so for Communism. I know that Communism is a classless society, and resources are distributed according the principle of "From each according to his ability, to each according to his need". But how is it decided what one's ability requires him to produce and similarly how is it decided what one's needs entitles him to? What mechanism is used to distribute resources in this fashion? How would justice be handled? (Can you steal if their is no private property?) How would the country interact with other countries, for example reach trade agreements or go to war?

**Edit:** It has been pointed out Communism may be more of an econmic system rather than a system of government but my question still remains, I don't understand how it functions as an economic system either.

Other parts of Communism that people talk about a lot for example the "proletarian rising up against the Bourgeoisie" and "seizing control of the means of production" appear to me to be irrelevant to how Communism would actually work because this would only happen once. A society where the proletarian are constantly rising up against the Bourgeoisie makes no sense. Am I correct about this?

I hope this question make sense, because it is something that has bugged me for a long time.
gpt
Communism is an economic system, not a form of government. You have to compare it to capitalism and feudalism, not democracy and monarchy. There's no reason you couldn't have a communist democracy, or a communist monarchy, or a communist any-other-government. Communism doesn't refer to who runs the distribution or how they run it, and has nothing to do with justice or foreign relations.

The proletariat uprising is how Marx thought we'd leave capitalism. The important part is that the proletariat has control of the means of production, not that they seized it. After communism is established, there wouldn't be a bourgeoisie to be risen up against, because there wouldn't be any classes.