Poetry Help!

can someone help me find the literary devices of this poem and there importance?

“Shine, Perishing Republic”
By Robinson Jeffers
While this America settles in the mould of its vulgarity,
heavily thickening to empire
And protest, only a bubble in the molten mass, pops and
sighs out, and the mass hardens,

I sadly smiling remember that the flower fades to make
fruit, the fruit rots to make earth.
Out of the mother; and through the spring exultances,
ripeness and decadence; and home to the mother.

You making haste haste on decay: not blameworthy; life
is good, be it stubbornly long or suddenly
A mortal splendor: meteors are not needed less than
mountains: shine, perishing republic.

But for my children, I would have them keep their distance
from the thickening center; corruption
Never has been compulsory, when the cities lie at the
monster's feet there are left the mountains.

And boys, be in nothing so moderate as in love of man,
a clever servant, insufferable master.
There is the trap that catches noblest spirits, that caught
they say God, when he walked on earth.