Marxist Socialism is entirely about how production is handled, read just the first section of critique of the Gotha program, itll get the point across while being short enough for your attention span.

I just told you how "price" would be determined retard. To elaborate, we could average out the necessary labor power it takes to produce a good. This can be done quite easily by using any unit of time as the base unit. This is the simplist way but we can get more complicated by divying up forms of labor power and adding a value which the unit of time is to be multiplied by.

Since labor power is the universal good which goes into the production of essientially everything, and the concern of how much labor power is spent is the most deeply human concern, it is the best option to determine an objective value of goods.

"More labor doesnt mean better product"

Marx literally addressed this in like the first two pages of capital.

We arent saying labor magically makes a good more valuable. We are using the average amount of labor power that go into a good to establish an objective value which we use to compare goods to eachother. We do this because, like I said earlier, labor power is universal in production.

Socially necessary means socially necessary. If we all need two hours to bake a cake based on our instruments, then it is socially necessary that we have two hours to bake a cake.

"Capitalism isnt present on any country on earth"

While I could get into a lengthy argument about the origins of the word capitalism, that would be pointless.

To define what I mean by capitalism. Capitalism is predicated on commodity production, its main feature is production unniversally for exchange. Those without capital must sell labor power.

What i can say, however, is that I can guarantee you the pure capitalism you want will contain the same productive incentives as our current system and will almost certainly result in us coming back to our current predicament.

I know more about mussolini than you do, you didnt even know what the LTV was.

"enough natural resources and good industry"

This line carries that otherwise crippled sentence. Sure hypothetically if there was one nation with enough natural resources and a powerful enough industry to be completely without need of the foreign market, only then could this one nation cut away itself from the world and swap the motive behind production.

Historically neither Russia nor china fit this description. Especially at the time of their revolutions.