If I am not mistaken, Initially anarchism was called libertarianism, but later libertarianism was co-opted by American pro-market believers and now refers to anarcho-capitalists.
As for why an-caps are not real anarchists you can read an in depth explanation here. But briefly it is just an oxymoron.
Anarchists believe in a world without hierarchies and capitalism is a system defined by the existence of two classes of people(capitalists and working people) and their relationship to the means of production. So there is an inherently hierarchical relationship within capitalism.
What’s the difference between this and libertarianism?
If I am not mistaken, Initially anarchism was called libertarianism, but later libertarianism was co-opted by American pro-market believers and now refers to anarcho-capitalists.
As for why an-caps are not real anarchists you can read an in depth explanation here. But briefly it is just an oxymoron. Anarchists believe in a world without hierarchies and capitalism is a system defined by the existence of two classes of people(capitalists and working people) and their relationship to the means of production. So there is an inherently hierarchical relationship within capitalism.
Anarchism is older and we have actual working examples