I may perhaps recapitulate the points about that Order here.

In the "Modern Utopia" the visitor from earth remarks:--

"These Samurai form the real body of the State. All this time that I
have spent going to and fro in this planet, it has been growing upon me
that this order of men and women, wearing such a uniform as you wear,
and with faces strengthened by discipline and touched with devotion, is
the Utopian reality; that but for them the whole fabric of these fair
appearances would crumble and tarnish, shrink and shrivel, until at
last, back I should be amidst the grime and disorders of the life of
earth. Tell me about these Samurai, who remind me of Plato's guardians,
who look like Knight Templars, who bear a name that recalls the
swordsmen of Japan. What are they? Are they an hereditary cast, a
specially educated order, an elected class? For, certainly, this world
turns upon them as a door upon its hinges."

His informant explains:--

"Practically the whole of the responsible rule of the world is in their
hands; all our head teachers and disciplinary heads of colleges, our
judges, barristers, employers of labour beyond a certain limit,
practising medical men, legislators, must be Samurai, and all the
executive committees and so forth, that play so large a part in our
affairs, are drawn by lot exclusively from them. The order is not
hereditary--we know just enough of biology and the uncertainties of
inheritance to know how silly that would be--and it does not require an
early consecration or novitiate or ceremonies and initiations of that
sort. The Samurai are, in fact, volunteers. Any intelligent adult in a
reasonably healthy and efficient state may, at any age after five and