As others have said, that's basically anarchism, except for this bit:
> It is a fundamental principle of social philosophy, fixed and unchangeable, that one should not withdraw from individuals and commit to the community what they can accomplish by their own enterprise and industry.
Which is flagrant lassaize faire capitalist propaganda, but that's ok, because it's not possible to point to something an individual can accomplish by their own enterprise and industry - such things simply don't exist because we don't have superheroes, we're all the outcome of society.
You don't have to be a superhero to be solidary. Subsidiarity goes against this idea of the necessity of an all encompassing centralized state. There are things that are better done at the local level.
> It is a fundamental principle of social philosophy, fixed and unchangeable, that one should not withdraw from individuals and commit to the community what they can accomplish by their own enterprise and industry.
Which is flagrant lassaize faire capitalist propaganda, but that's ok, because it's not possible to point to something an individual can accomplish by their own enterprise and industry - such things simply don't exist because we don't have superheroes, we're all the outcome of society.