system
A chat on subreddit /r/PoliticalCompassMemes
human
not everything debunks Marxism, but the advances on economics in the late 19th and early 20th century do debunk it.

1871: Carl Menger's Principles of Economics  introduced Marginal Utility which debunked the long misconception that value of products was objective and predetermined. The idea that a products value was predetermined was held by the classic school of economy, and used by Marx. The classic school themselves belived that for wages to rise, benefits would have to diminish, something which completelly validated Marx's ideas. Carl Menger correctly theorizes that value is not originated from the production side of things, but by the consumers, and the consumers value things subjectivelly based on their own judgement, information, etc

Shortly after, his disciple Bohm Bawerk explained the worker-capitalist relationship introducing time into the equation. Why do loans have an interest rate? Because people preffer current goods over future goods. In an identical sense, the capitalist gives the worker a "loan" (wage) based on the capitalist's expectation of making more money off the final product in the middle, which would be returns on this sort of "loan".  And outside of industry, in the service business and such, theres many variables and income isnt insured at all, so it can be an even more uncertain "loan" which the worker doesnt even have to return, since its the capitalist whos taking the risk and the one whos responsible.

1920: Mises debunks central planning altogether with his book "Economic Calculation in the Socialist Commonwealth". It can be summed up in a paragraph: "Without ownership, there is no exchange. Without exchange, there are no prices. Without prices, theres no economic calculation. Without economic calculation, production decisions are made in the dark. When that happens, basic needs go unmet." 

This is what happened in centrally planned supermarkets in the USSR, which were often empty, and caused long lines of people waiting for their food. Black free markets somewhat alleviated this and made sure people had food at their homes.
gpt
I gotta poop