It's never true. It's like a broken clock - it's right 2 times a day. When the conditions are exactly correct, it seems like the labor theory of value is true - but it's not. Consider a simple example - food production. Nothing changes about the labor necessary to produce it but that doesn't mean you won't have to sell your produce way under price (or let it rot) if you and other farmers make too much of it.
yogthos|3 years ago
leethaxor|3 years ago
My point is that value is actually not determined by "socially necessary labor" but by supply and demand, even within a commune. The food you produce will rot if you and others produce too much of it = it has no value, and nobody collects profit (not even in the form of social capital) because everybody lost any possibility of selling for a good price by producing too much.
On the other hand during a shortage people will start valuing food much more than they previously did, gradually paying higher price as they have less of it - again totally disconnected from the "socially necessary labor" required to produce it.
Most importantly - the value of most if not all things is subjective and different based on time, place, etc. Even within a commune - some people simply don't like peppers, so even though you put a lot of work into them they have no value to these people (which will quickly change once there's a food shortage).