In contrast to the classical cost (labor) theory of value, the so-called marginal revolution ushered in the modern, subjective theory, whereby market price is determined by the marginal utility of a good.
The foundational assumption behind the gun control narrative is that only government law enforcement agencies should have guns and that we should trust police to keep us "safe." That narrative is failing.
Syndicalism is direct violent action against the institutions of capitalism, such as security forces, and especially property owned by businesses. This approach is often adopted by Marxists, socialists, and fascists as a means of gaining power.